Heater, FloThru, Universal, 15″ x 2″, 230v, 4.0kW, w/Union | 48-1540-HS

Universal FloThru Spa Heater 4.0kW

Model: 48-1540-HS

Product Overview

We supply this versatile universal FloThru heater, designed to simplify repairs and maintenance across multiple spa models. This 15-inch heater represents the perfect balance of reliability, versatility, and performance for your hot tub heating needs.

Key Features

• Professional-grade 4.0kW heating element
• Universal 15″ length design
• Premium stainless steel construction
• Multiple pressure switch ports with stainless steel plugs
• Adjustable grounding and mounting studs
• Customizable thermowell cover position
• Complete with 2″ heater tailpieces including gaskets/o-rings
• Versatile union connections for easy installation

Universal Compatibility

This 4.0kW heater serves as a direct replacement for both 4.0kW and 4.5kW systems, making it a truly universal solution for multiple spa brands and models. The adjustable components ensure proper fit across various configurations.

Professional Benefits

• Streamlined inventory management
• Single-visit repair capability
• Wide compatibility across spa brands
• Time-saving installation features
• Robust construction for long-term reliability

Technical Specifications

Specification	Detail
Model Number	48-1540-HS
Voltage	230V
Power Rating	4.0kW
Length	15 inches
Diameter	2 inches
Connection Type	Union fittings
Construction	Stainless steel
Temperature Control	Adjustable thermowell
Mounting	Adjustable studs
Pressure Ports	Multiple (switch not included)
Application	Universal hot tub/spa

Installation Notes

The adjustable design elements of this heater allow for custom positioning of key components, ensuring compatibility with your specific installation requirements. The unit comes complete with all necessary gaskets and O-rings for the tailpieces.

Compatibility

This universal heater is engineered to replace numerous OEM spa heaters across major brands and models. The adaptable design features ensure proper fitment in most standard spa configurations.

Note: Pressure switch sold separately

Below you will find information on specific heaters the universal heater can match.

Picture	Part #	Description	Tube Length	Rating
	46-371-1210	Flo ThruHeater 4.0KW 2″x15″ PS/SI Brett/Caldera	15″	4.0kW
	46-371-1199	Flo thruHeater 4.5KW 2″x15″ Hydroquip 5/97-Now	15″	4.5kW
	46-320-1165	Flo ThruHeater Assy 2″x15″ PS/TI 4.0kW Brett	15″	4.0kW

🔧 Parts and fittings for this

Commonly replaced parts

Parts commonly replaced on this item that we stock.