💧 Laing E-10 EcoCirc 6050U0013 Spa Circulation Pump – 115V 3/4″ MPT Threaded

Threaded connections for leak-free installation with whisper-quiet ECM circulation technology

🔄 Product Overview

The Laing E-10 EcoCirc 6050U0013 is a 115V single-speed spa circulation pump with 3/4″ male pipe thread (MPT) connections and a 4-foot bare cord included, designed for continuous 24/7 low-flow heater circulation. This is the threaded-connection variant of the E-10 series — identical motor and performance to the barb versions, but with NPT threaded ports that provide a more secure, permanent connection for spas originally plumbed with threaded fittings.

Powered by advanced Electronically Commutated Motor (ECM) technology, this pump consumes up to 40% less energy than the SM909 and SM1212 series it directly replaces. The magnetically driven open impeller eliminates the traditional shaft seal entirely — removing the number one failure point in conventional circulation pumps. Built with clog-resistant open impeller design using Polyphenylene Oxide (PPO) material, the E-10 handles debris that would stall closed-impeller pumps. The 32-bit motor with side vents provides improved cooling, while built-in dry run protection and soft start (~3 seconds) safeguard the pump and reduce mechanical stress.

Delivering up to 14 GPM with a maximum head of 20 feet, this pump is OEM equipment in Marquis Spas (1994-1997 models including Euphoria, Reward, Mirage, Quest, Retreat, Oasis, Spirit, Voyage, Crossing, Secret, Departure, Destiny, and Serenity series) and is used across major spa brands. The threaded 3/4″ MPT connection is specifically required for spas with threaded plumbing — do NOT substitute a barb version for a threaded application without proper adapters. Compact, lightweight (under 5 lbs), and whisper-quiet, the E-10 fits tight equipment compartments with ease.

⭐ Key Features

• ✅ 3/4″ Male Pipe Thread (MPT) Connections — Threaded suction and discharge for secure, leak-free installation on spas with threaded plumbing
• ✅ ECM Technology — Electronically Commutated AC/DC/AC Spherical Motor consumes 40% less energy than previous SM909/SM1212 series
• ✅ 115V / 62W — Ultra-low power consumption for pennies-per-day continuous 24/7 operation
• ✅ 15 GPM Maximum Flow — Optimal flow for low-flow heater systems with 20 ft maximum head
• ✅ Magnetically Driven Open Impeller — NO shaft seal to leak or replace, plus clog-resistant PPO (Polyphenylene Oxide) construction
• ✅ Built-In Dry Run Protection — Embedded microprocessor automatically detects no-water condition and shuts down to prevent damage
• ✅ Soft Start Technology — Approximately 3-second gradual startup reduces mechanical stress and extends pump life
• ✅ 4-Foot Bare Cord INCLUDED — Pre-wired and ready for direct connection to spa control system
• ✅ 32-Bit Motor with Side Vents — Advanced motor design with improved heat dissipation for longer service life
• ✅ Marquis Spas OEM — Factory-installed in Marquis Spas 1994-1997 models (Euphoria, Reward, Quest, Mirage, and many more)
• ✅ 50/60 Hz Compatible — Works on both domestic (60 Hz) and international (50 Hz) electrical systems
• ✅ 1-Year Manufacturer Warranty — Full coverage from Laing Thermotech / Xylem

🔩 Technical specifications

⚡ Electrical Requirements

⚠️ CRITICAL — 115V ONLY:

This pump operates on 115V ONLY. Do NOT connect to a 230V circuit. Using the wrong voltage will damage the motor. For 230V spas with threaded connections, order the Laing E-10 model 6050U0014 or 73999 (3/4″ MPT, 230V).

🔗 Compatibility Guide

Laing E-10 Family — All Connection Variants

Part Number	Voltage	Connection	HydroQuip #
6050U0013 / 74009 (This Pump)	115V	3/4″ MPT (Threaded)	10-0124 / LHB07100141
6050U0014 / 73999	230V	3/4″ MPT (Threaded)	10-0121 / LHB07100140
6050U0015 / 73989	115V	3/4″ Barb	10-0120 / LHB07100139
6050U0016 / 73979	230V	3/4″ Barb	10-0121 / LHB07100138
6050U0011 / 74069	115V	1″ Barb	10-0122 / LHB07100143
6050U0010	230V	1″ Barb	—

⚠️ Threaded (MPT) vs Barb — Critical Difference

Feature	6050U0013 (This Pump) — MPT	6050U0015 — Barb
Connection Type	3/4″ Male Pipe Thread (NPT)	3/4″ Hose Barb
How It Connects	Screws into female threaded fitting	Slides into flexible hose, secured with hose clamp
Best For	Spas with rigid threaded plumbing or female union fittings	Spas with flexible tubing or hose connections
Voltage	115V	115V
Motor / Performance	Identical	Identical
Dimensions	Identical	Identical
Physical OD	1″ OD (threads are 3/4″ NPT)	3/4″ OD

⚠️ CRITICAL: Threaded (MPT) and barb connections are NOT interchangeable. If your existing pump has threaded connections, order this pump (6050U0013). If your existing pump has barb connections, order 6050U0015 instead. Using the wrong connection type will result in leaks or inability to install.

SM909-NT Series — Replaced By E-10 MPT

The Laing E-10 with 3/4″ MPT directly replaces ALL previous Laing SM909 threaded (NT) series circulation pumps.

Previous Model	Allied Part #	Flow Rate	Replaced By
909-NT-14 (6845)	1-00-0169	6 GPM	E-10 6050U0013 (15 GPM)
909-NT-26 (6850)	1-00-0171	9.5 GPM	E-10 6050U0013 (15 GPM)
909-NT-18 (6831)	1-00-0175	11 GPM	E-10 6050U0013 (15 GPM)
SM909NTW-14	—	3/4″ Thd 115V	E-10 6050U0013 (Direct)
SM909NTW-18	—	3/4″ Thd 115V	E-10 6050U0013 (Direct)
SM909NTW-26	—	3/4″ Thd 115V	E-10 6050U0013 (Direct)
SM1212NTW-26	—	3/4″ Thd 115V	E-10 6050U0013 (Direct)

Compatible Spa Brands (Threaded Connection)

• ♨️ Marquis Spas — OEM equipment (630-6330). Models: Euphoria MTS, Reward MTS, Quest MTS, Mirage, Retreat, Oasis, Spirit, Voyage, Crossing, Secret, Departure, Destiny, Serenity (1994-1997)
• ♨️ Sundance Spas — Threaded connection models
• ♨️ L.A. Spas — Threaded connection models
• ♨️ Atlantic Coast Spas
• ♨️ Gatsby Spas
• ♨️ Hawkeye Spas
• ♨️ Royal Spas
• ♨️ Saratoga Spas
• ♨️ Hot Springs — Threaded connection models

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🔩 Alternate Part Numbers & Cross-References

🔧 Parts and fittings for this

Primary Part Numbers

Part Number	Description
6050U0013	Laing Primary Part Number
74009	Laing Alternate Part Number
E10-NSTN1W-19	Laing Full Model Number
E10-NSTNNN1W-19	Laing Model Number (Alternate)
E10-NSTNDNN1W-02	Laing Model Number (Alternate)
733886740097	UPC Code

HydroQuip Cross-References

Part Number	Notes
10-0124	HydroQuip Part Number
10-0124-K	HydroQuip Kit Version
LHB07100141	HydroQuip Internal Code

Marquis Spas Cross-References

Part Number	Notes
630-6330	Marquis Spas OEM Part Number

Allied Innovations Cross-References

Part Number	Notes
1-00-0071A	Allied Part Number
1-00-0169	Allied — Replaces Laing 909-NT-14 (6 GPM)
1-00-0171	Allied — Replaces Laing 909-NT-26 (9.5 GPM)
1-00-0171A	Allied Part Number
1-00-0175	Allied — Replaces Laing 909-NT-18 (11 GPM)

Sundance / Jacuzzi Cross-References

Part Number	Notes
6831	SM-909-NT-18 — 11 GPM
6845	SM-909-NT-14 — 6 GPM
6850	SM-909-NT-26 — 9.5 GPM
6918	Sundance/Jacuzzi Threaded Circ Pump

Previous SM909-NT / SM1212-NT Model Codes

Part Number	Notes
SM909NT	SM909 Threaded Model Code
SM909NTW-14	SM909 3/4″ Thread 115V — 6 GPM
SM909NTW-18	SM909 3/4″ Thread 115V — 11 GPM
SM909NTW-26	SM909 3/4″ Thread 115V — 9.5 GPM
SM1212NTW-26	SM1212 3/4″ Thread 115V
LAISM909NT18120	Laing SM909-NT Code
LAISM909NT26120	Laing SM909-NT Code

Other Industry Cross-References

Part Number	Notes
34-158-1454	Industry Part Number
9338-20	Industry Cross-Reference
9335-0	Industry Cross-Reference
9339-09	Industry Cross-Reference
9340-0	Industry Cross-Reference
9431	Industry Cross-Reference
313662	Industry Cross-Reference
611124	Industry Cross-Reference

UPC Cross-References

UPC	Notes
733886740097	Primary UPC
733886683103	UPC Cross-Reference
733886684506	UPC Cross-Reference
733886685008	UPC Cross-Reference

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🛠️ Installation Requirements

What’s in the Box

• ✅ Laing E-10 EcoCirc Circulation Pump with 3/4″ MPT Connections
• ✅ 4-Foot Bare Cord (Pre-Wired, 3 Wires, No Connectors on Cord End)
• ✅ Built-In Mounting Bracket
• ❌ Unions / Fittings — NOT INCLUDED (Order Separately If Needed)

Mounting

Requirement	Specification
Mounting Position	Horizontal, or Vertical with motor end down
Bracket	Built-in mounting bracket with 4 discharge angle positions
Base	Solid, level surface
Ventilation	Side vents must remain clear for motor cooling
Access	Sufficient clearance for service and maintenance

Plumbing

Connection	Size	Type
Suction	3/4″ MPT (1″ OD) — Center	Male Pipe Thread
Discharge	3/4″ MPT (1″ OD) — Side	Male Pipe Thread
Volute Fastening	4 Bolts and 4 Nuts	—

Threaded Connection Installation Tips

⚠️ Apply Teflon tape or pipe thread sealant to the male threads before screwing into female fittings to ensure a leak-free seal.

⚠️ Hand-tighten first, then use a wrench for an additional 1-2 turns. Do NOT over-tighten — the thermoplastic wet end can crack under excessive torque.

⚠️ The physical outside diameter of the 3/4″ MPT threads is 1″ OD. Ensure your female fittings accept standard 3/4″ NPT threads.

General Installation Notes

⚠️ Pump must be installed below water level (flooded suction) to operate properly.

⚠️ Built-in dry run protection will shut down the pump if operated without water — however, always ensure flooded suction before starting.

⚠️ 4-foot bare cord has 3 wires with NO connectors on the cord end. Wire to your spa control system connecting hot, neutral, and ground per your spa’s wiring requirements.

⚠️ Soft start feature provides approximately 3-second gradual startup — this is normal operation, not a fault.

⚠️ Can be mounted horizontally or vertically with the motor end pointing down. Do NOT mount with motor end up.

⚠️ Counter-clockwise rotation when viewed from the motor end — do not attempt to reverse.

⚠️ GFCI protection is required by the National Electrical Code (NEC) for all hot tub and spa installations.

⚠️ 115V ONLY — verify your spa’s voltage before ordering. For 230V with threaded connections, order 6050U0014 or 73999.

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🔧 Maintenance Guide

Routine Maintenance

Task	Frequency	Notes
Check threaded connections for leaks	Monthly	Re-seal with Teflon tape if needed
Verify tight threaded fittings	Monthly	Do not over-tighten thermoplastic
Check flow rate	Monthly	Reduced flow indicates blockage
Inspect motor side vents	Quarterly	Keep clear of debris for cooling
Verify quiet operation	Quarterly	Unusual noise indicates bearing wear
Check mounting bracket	Quarterly	Tighten if loose
Clean open impeller area	As Needed	Remove any debris if flow decreases

Warning Signs — Replace Pump If:

• Unusual noise (grinding, humming, rattling)
• Motor overheating excessively
• Reduced or no water flow despite clear suction
• Motor trips breaker repeatedly
• Pump fails to start after soft start period
• Dry run protection activates repeatedly with water present
• Cracked wet end housing from over-tightened threaded connections

Magnetically Driven Impeller — NO Seal Replacement Needed

The Laing E-10 uses a magnetically driven impeller with NO mechanical shaft seal. Unlike conventional shaft-seal circulation pumps (Gecko CMHP, Waterway Iron Might, Balboa) where the seal is the most common failure point, the E-10’s magnetic drive completely eliminates this component. There is no seal to leak, wear out, or replace — ever.

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🎯 Ideal Applications

Application	Suitability	Notes
♨️ 24/7 Spa Circulation	✅ Yes — Primary Use	Continuous duty low-flow heater circulation
♨️ Low-Flow Heater Systems	✅ Yes — Primary Use	15 GPM max flow, 20 ft max head
♨️ Marquis Spas (1994-1997)	✅ Yes — OEM	Replaces 630-6330 — direct factory replacement
♨️ Spas with Threaded Plumbing	✅ Yes — Primary Use	3/4″ NPT male thread connections
♨️ Replacement SM909-NT (Threaded)	✅ Yes — Direct	Replaces ALL SM909 and SM1212 threaded models
♨️ Sundance / L.A. / Atlantic Coast	✅ Yes	Threaded connection models
♨️ Gatsby / Hawkeye / Royal / Saratoga	✅ Yes	Threaded connection models
♨️ Ozone Treatment Systems	✅ Yes	Compatible with ozone injection
♨️ Saltwater Spa Systems	✅ Yes	Saltwater compatible
🛁 Spas with 3/4″ Barb Plumbing	❌ No — Wrong Type	Use 6050U0015 (3/4″ barb, 115V) instead
🛁 Spas with 1″ Barb Plumbing	❌ No — Wrong Size	Use 6050U0011 (1″ barb, 115V) instead
🛁 230V Spa	❌ No — 115V Only	Use 6050U0014 or 73999 (3/4″ MPT, 230V)
🛁 1-1/2″ MBT Plumbing	❌ No	Use Gecko Aqua-Flo CMHP for 1-1/2″ connections

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❓ Frequently Asked Questions

Q: What does MPT mean? A: MPT stands for Male Pipe Thread — also called NPT (National Pipe Thread). The pump has external threads that screw into a female threaded fitting on your spa’s plumbing. This is different from barb connections, which slide into flexible hose and are secured with hose clamps.

Q: What is the flow rate of this pump? A: Maximum 14 GPM with a maximum head of 20 feet. Designed for continuous 24/7 low-flow heater spa circulation.

Q: What is the physical outside diameter of the threaded connections? A: The 3/4″ MPT threads have a physical outside diameter of 1″ OD. This is standard for 3/4″ NPT pipe threads. Your female fittings must accept standard 3/4″ NPT threads.

Q: Does this pump come with a power cord? A: Yes. A 4-foot bare cord with 3 wires is included and pre-wired to the pump. The cord end has NO connectors — you wire directly to your spa’s control system connecting hot, neutral, and ground.

Q: Can I use this pump if my spa has barb connections? A: No. Threaded (MPT) and barb connections are not interchangeable. If your spa uses hose barb connections, order the 6050U0015 (3/4″ barb) or 6050U0011 (1″ barb) instead. Using the wrong connection type will result in leaks or inability to install.

Q: Does this fit Marquis Spas? A: Yes. The 6050U0013 (Marquis part 630-6330) is the OEM factory circulation pump for Marquis Spas from 1994-1997, including Euphoria, Reward, Quest, Mirage, Retreat, Oasis, Spirit, Voyage, Crossing, Secret, Departure, Destiny, and Serenity models.

Q: Does this replace the Laing SM909-NT threaded series? A: Yes. The E-10 directly replaces ALL SM909 and SM1212 threaded (NT) series models while consuming up to 40% less energy: 909-NT-14 (6845, 6 GPM), 909-NT-26 (6850, 9.5 GPM), and 909-NT-18 (6831, 11 GPM).

Q: Does this pump have a shaft seal? A: No. The E-10 uses a magnetically driven impeller that completely eliminates the mechanical shaft seal. There is no seal to leak, wear out, or replace.

Q: What is dry run protection? A: The E-10 has an embedded microprocessor that automatically detects when the pump is running without water and shuts it down to prevent motor and pump damage.

Q: Should I use Teflon tape on the threads? A: Yes. Apply Teflon tape or pipe thread sealant to the male threads before screwing into female fittings. Hand-tighten first, then wrench-tighten 1-2 additional turns. Do NOT over-tighten as the thermoplastic wet end can crack.

Q: Can I mount this pump vertically? A: Yes. The E-10 can be mounted horizontally or vertically with the motor end pointing down. Do NOT mount with motor end up.

Q: What voltage does this pump require? A: 115V ONLY (also referenced as 110V or 120V — same standard). Works on both 50 Hz and 60 Hz. For 230V with threaded connections, order 6050U0014 or 73999.

Q: Is this pump quiet? A: Yes, extremely. The E-10 operates whisper-quiet at under 50 dB. The ECM motor with soft start technology contributes to virtually silent operation.

Q: Do I need a GFCI breaker? A: Yes. GFCI protection is required by the National Electrical Code (NEC) for all hot tub and spa installations.

Q: What warranty is included? A: 1-year manufacturer warranty from Laing Thermotech / Xylem. Contact Parts4Tubs for full warranty terms and support

🏆 Why Choose the Laing E-10 EcoCirc 6050U0013

• ✅ 3/4″ MPT Threaded Connections — Secure, leak-free installation for spas with threaded plumbing
• ✅ ECM Motor Technology — 40% more energy-efficient than the SM909/SM1212 series it replaces
• ✅ Built-In Dry Run Protection — Embedded microprocessor prevents costly damage from operating without water
• ✅ Soft Start Technology — Gradual 3-second startup reduces mechanical stress and extends pump life
• ✅ Magnetically Driven Open Impeller — NO shaft seal to leak or replace, PLUS clog-resistant PPO construction
• ✅ Whisper-Quiet Operation — Under 50 dB for virtually silent running
• ✅ Marquis Spas OEM — Direct factory replacement for 1994-1997 Marquis models
• ✅ Horizontal or Vertical Mounting — Flexible installation with 4 discharge angle positions
• ✅ 50/60 Hz Compatible — Works on both domestic and international electrical systems
• ✅ Compact and Lightweight — Under 5 lbs fits tight equipment compartments
• ✅ Laing Thermotech / Xylem Quality — Decades of proven reliability in spa circulation
• ✅ 1-Year Manufacturer Warranty — Full coverage for peace of mind

🤝 Why Buy from Parts4Tubs

• ✅ Fast shipping across the United States
• ✅ Expert advice from spa and hot tub specialists
• ✅ Competitive pricing
• ✅ Full warranty support
• ✅ Hassle-free returns
• ✅ Complete Laing E-10 family in stock — all connection types (barb, MPT), all voltages (115V, 230V)
• ✅ Dedicated customer service team

✨ Summary

The Laing E-10 EcoCirc 6050U0013 is a 115V spa circulation pump with 3/4″ male pipe thread (MPT) connections — the threaded-connection variant for spas with rigid threaded plumbing. Featuring advanced ECM technology at just 62W, built-in dry run protection, soft start, a magnetically driven clog-resistant open impeller with no shaft seal, and a 4-foot bare cord included, this pump directly replaces all SM909-NT and SM1212-NT threaded series models. OEM factory equipment in Marquis Spas (1994-1997). Order from Parts4Tubs today for fast shipping and expert support.

 

Unions and pump cords: pick the union size that matches your pump's ports (see the size chart below), and a 4-wire cord for a 2-speed pump.

How do I Replace a Hot Tub Pump?

Here's a general step-by-step guide on how to replace a hot tub pump. Keep in mind that the specific steps may vary depending on your hot tub's make and model, so it's essential to consult your hot tub's manual for model-specific instructions. If you're not comfortable with this procedure, it's a good idea to seek professional assistance.

Materials You'll Need:

• Replacement pump
• Screwdriver
• New union O-rings
• A strap wrench, only if a union nut is stuck
• PVC primer and cement, only if you are gluing in new tailpieces

Procedure:

1. Turn Off the Power: Before you begin, ensure the hot tub's power supply is turned off at the circuit breaker or disconnect switch. Safety should always be a priority when working with electrical components.

2. Drain the Hot Tub: If your hot tub is not already empty, you'll need to drain it. Follow your hot tub's manual or manufacturer's instructions for proper draining. (You might not need to do this if you can lock the pump off with the gate valves)

3. Locate the Pump: Identify the location of the existing pump in your hot tub. It's usually located near the equipment area or in a designated pump compartment.

4. Disconnect the Electrical Wiring: Carefully disconnect the electrical wiring from the old pump. This typically involves removing the electrical conduit cover, unscrewing wire nuts, and disconnecting the wires from the terminals. Be sure to note the wire connections or take a picture for reference when connecting the new pump.

5. Disconnect the Plumbing: Depending on your hot tub's plumbing setup, you'll need to disconnect the plumbing connections to the pump. Unscrew the union nuts by hand. If one is stuck, use a strap wrench rather than a pipe wrench, which can crack the nut. Be prepared for some water spillage when disconnecting the plumbing.

6. Remove the Old Pump: Once the electrical and plumbing connections are detached, carefully remove the old pump from its mounting position. Some pumps may be secured with mounting brackets or bolts.

7. Prepare the New Pump: If the new pump is not pre-assembled, you may need to attach fittings, unions, or adapters to match your hot tub's plumbing. Pump unions use buttress threads that seal on an O-ring, so fit new O-rings and hand-tighten the nuts. Do not use thread tape, pipe dope or sealant on them.

8. Mount the New Pump: Position the new pump in the same location as the old one and secure it in place using the mounting brackets or bolts.

9. Reconnect Plumbing: Reconnect the plumbing to the new pump, hand-tightening the union nuts. If you are gluing in new PVC tailpieces, use PVC primer and cement on those joints.

10. Reconnect Electrical Wiring: Reconnect the electrical wiring to the new pump, following the notes or pictures you took earlier. Make sure all wires are properly connected and secure.

11. Turn On the Power: Restore power to the hot tub by switching on the circuit breaker or reconnecting the disconnect switch.

12. Test the Pump: Turn on the hot tub's pump to ensure that it's working correctly. Check for any signs of leaks or irregularities in the plumbing connections.

13. Refill the Hot Tub: Once you've confirmed that the new pump is functioning properly, refill the hot tub with water.

14. Check for Leaks: Inspect the plumbing connections for any leaks. If you find any, turn off the pump, drain the tub again, and reseal the connections as needed.

15. Monitor: Keep an eye on the pump and plumbing for the next few days to ensure everything is functioning correctly and that there are no further issues.

Remember that this is a general guideline, and the specific steps may vary based on your hot tub's design. If you're unsure or uncomfortable with any aspect of this process, please do get in touch, happy to help.

How do I know what size hot tub pump I have?

Determining the size of your hot tub pump is an important step when it comes to maintenance or replacement. To find out the size of your hot tub pump, follow these steps:

1. Check the Manual: The easiest way to determine the size of your hot tub pump is to consult the owner's manual or user documentation that came with your hot tub. The manual typically contains detailed information about the specifications and components of your hot tub, including the pump.

2. Look at the Pump Housing: If you don't have access to the manual or it doesn't provide the information you need, inspect the pump itself. Most hot tub pumps have a label or plate on the pump housing that displays essential details, including the pump's model number, manufacturer, and specifications. You can then send that to me or Google it.

3. Measure the Pump: If the label is missing or damaged, you can measure the pump's dimensions. Measure the diameter of the pump's wet end (the part where the water flows) and the length of the wet end. These measurements can help identify the size and capacity of the pump.

4. Consult the Manufacturer: If you can't find the information on the pump or in the manual, contact the hot tub manufacturer or a reputable dealer. Provide them with your hot tub's model and serial number, and they should be able to identify the correct pump size for your specific hot tub.

5. Online Research: You can also search online using the pump's model number or hot tub's make and model. Many manufacturers provide detailed information about their products on their websites, and you may find specifications for your pump model.

Once you have determined the size and specifications of your hot tub pump, you can proceed with maintenance, repairs, or replacement if necessary. Keep in mind that replacing a hot tub pump with the same size and capacity as the original is crucial to ensure proper water circulation and filtration in your hot tub. If you're unsure about any aspect of this process, get in touch, always happy to help.