Tecmark Pressure Switch 3902
$33.66
Pressure Switch, Tecmark, SPST, 1 Amp, 1-5 Psi, 1/8″ NPT w/ Screws
| Returns | 30-day returns – see our returns policy |
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Tecmark Pressure Switch 3902 Committed to quality, delivery and service Tecmark Series 3000, 3900 and 4000 Pressure Switches convert a positive or negative pressure signal (range 2” W.C. to 100 PSI) to an electrical output. Tecmark Pressure Switches are available in various configurations for air, gas and liquid sensing applications. Tecmark switches can sense pressures as low as 2″ w.c. up to 100 PSIG with electrical ratings up to 25 amps.
Additional Information
| Thread Material | Metal |
| Inlet Size/Outlet Size | 1/8" MPT |
| Amperage (Amps) | 1 |
Alternate Part Numbers
- 5-20-0030
- TDI3902
- 36142
🔧 Exploded diagram and parts
This part belongs to the Hydro-Quip HeatMax Electric Pool & Spa Heater, 5.5kW/11.0kW assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 2 |  |
Hi-Limit, 5/16" dia, 12"Capillary, SPST, Screw Terminal, 25A | 275-3290-00 | Available to order | $64.51 | |
| 7 |  |
Hydro-Quip Heater Manifold Snap Nut 42-0007B | 42-0007B | 35 in stock | $7.04 | Add to cart |
| 8 |  |
Waterway O-Ring/Gasket 711-4030 | 711-4030 | 4402 in stock | $0.73 | Add to cart |
| 9 |  |
Tailpiece, 2"bt x 2"s,for Split Nut | 417-5050 | 657 in stock | $4.04 | Add to cart |
| 10 |  |
Reducer Bushing Fitting 437-251 – 2"SPG x 1-1/2"S | 437-251 | 779 in stock | $5.02 | Add to cart |
| 14 |  |
Hydro-Quip Knob 48-0013 | 48-0013 | 2 in stock | $11.18 | Add to cart |
Parts that go with this
| Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|
 |
Generic PTFE Teflon/Plumbers Thread Seal Tape A05-0265 | A05-0265 | 214 in stock | $1.27 | Add to cart |
 |
Switch Cover, Tecmark | 25165BM-02 | 7 in stock | $13.81 | Add to cart |
 |
Barb Fitting, Universal, 1/8" Barb x 1/8"fnpt, Brass | 522005 | 1799 in stock | $2.46 | Add to cart |
 |
Generic Brass Compression Fitting 1/8" x 1/4" | 522001 | 528 in stock | $1.76 | Add to cart |
 |
Compression Fitting, 1/8" x 3/16" Tube, Brass | 522000 | 2015 in stock | $1.89 | Add to cart |
 |
Reducer Bushing, 1/4"mpt x 1/8"fpt, Brass | 6AYW5 | 443 in stock | $1.55 | Add to cart |
Exploded parts diagrams: This part is shown as item #6 on the Hydro-Quip HeatMax Electric Pool & Spa Heater, 5.5kW/11.0kW; item #27 on the Pentair Minimax 150 – 400 Heaters (Mfg 1991-1997); item #13 on the Pentair Tropic Isle 60 Heater; item #14 on the Waterpik Laars Spaworks Electric in-line heater; item #11 on the Waterpik Laars Hot Shot Model 100, Mfg. 2001-2004; the Pentair Tropic Isle 120 – 400 Model Heaters exploded parts diagrams.
🔧 Pentair Tropic Isle 60 Heater – exploded parts diagram
The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| – | Flow Valve Spring, Pentair/Purex Tropic Isle, 3-1/4" |
| – | Flow Valve Plunger Fitting, Pentair/Purex Tropic Isle |
| – | Flow Valve Plunger Rod, Pentair/Purex Tropic Isle, 3/16" |
| – | 47-110-1078 |
| – | Flow Valve, Pentair/Purex Tropic Isle |
| – | Thermocouple, Pentair/Purex Tropic Isle 60, 18" |
| 33 | 47-110-1094 |
| 30 | 46-110-W013K30 |
| 29 | Baffle, Pentair Purex Tropic Isle |
| 28 | Insulated Rope, Pentair/Purex Tropic Isle, 1/4" |
| 27 | 47-110-1074 |
| 26 | Rubber Sleeve, Pentair/Purex Tropic Isle, 1-1/2" |
| 25 | Bushing, Lexan, Pentair/Purex Tropic Isle, 1-1/2" |
| 24 | Flange, Pentair/Purex Tropic Isle, 1-1/2", In/Out, Brass |
| 23 | Bolt, Pentair/Purex Tropic Isle, 16-3/8" x 1-1/4" |
| 22 | Hi-Limit, Pentair Minimax/Minimax Plus/PowerMax/Tropic Isle |
| 21 | Hi-Limit, Pentair/Purex Tropic Isle |
| 20 | Indicator Light, Pentair/Purex Tropic Isle, 24v, IID only |
| 19 | Thermostat, Pentair Purex Minimax/Tropic Isle, Millivolt |
| 18 | Rocker Switch, Pentair/Purex Tropic Isle 60, On/Off |
| 16 | Screw, Pentair/Purex Tropic Isle, 6 x 1/4" |
| 15 | Knob, Pentair Minimax/Tropic Isle |
| 14 | Transformer, Pentair, Minimax/PowerMax, 115v/230v, 24v |
| 13 | Pressure Switch 3902, 1A, Tecmark, Universal, SPNO, w/Brass ◀ this part |
| 12 | 46-110-W013K12 |
| 10 | Gasket, Pent Minimax/PowerMax/TI,Tube Bundle,3/4"ID,1-1/8"OD |
| 9 | Return Header, Pentair/Purex Tropic Isle 60 |
| 8 | 46-110-W013K8 |
| 7 | 46-110-W013D7 |
| 6 | 47-110-1030 |
| 5 | Burner, Pentair/Purex Tropic Isle 60, with Bracket, Pilot |
| 4 | 46-110-W013K4 |
| 3 | 46-110-W013K3 |
| 2 | 46-110-W013K2 |
| Brand | Tecmark |
|---|