American Pressure Systems

Search

Search pressure washers, parts, and sealers

100538

$59.95

$17.99 shipping · free on orders of $199 or more

VisaMastercardAmexDiscoverZelle & ACH also accepted — call 800-493-7692

A 2% fuel surcharge and 3.9% processing fee are added at checkout.

Ready to ship
Free over $199
Warranty
Financing available

Low Price Guaranteed

Found it cheaper somewhere else? We'll match it. Call 800-493-7692 and we'll beat the deal.

Overview

The General Pump 100538 is a probe-style thermostat with a copper immersion bulb and a 60-inch insulated stainless-steel capillary rated to 4000 PSI, controlling water temperature from 86 to 250°F. It panel-mounts on a hot-water pressure washer and uses a dual-scale knob to set the target temperature; the immersion bulb reads the water directly for rapid response within ±5°F. The 16(4)A-380V electric rating handles burner control circuits, and the assembly is UL/CSA approved. Use it to replace a failed or drifting thermostat on a hot-water skid or burner system so the coil holds a consistent, safe outlet temperature.

What's included

  • Probe-style sensing with copper immersion bulb
  • Insulated stainless-steel capillary, 60 in. long, bulb rated to 4000 PSI
  • Panel-mounted with dual-scale temperature knob
  • Rapid response, accurate to ±5°F
  • 86–250°F adjustment range
  • 16(4)A-380V electric rating
  • UL/CSA approved

Specifications

Temperature Range
86 – 250°F
Max PSI
4,000
Capillary Length
60 in.
Capillary Material
Insulated stainless steel
Bulb Material
Copper
Accuracy
±5°F
Electric Rating
16(4)A – 380V
Approvals
UL/CSA
Ship Weight
0.5 lbs.

Frequently asked questions

The copper immersion bulb sits in the water stream and senses temperature directly; when the water passes your set point on the dual-scale knob, the thermostat switches the burner circuit. The panel-mounted control responds rapidly and holds temperature within ±5°F across its 86–250°F range.

The immersion bulb is rated to 4000 PSI, so it can sit in the high-pressure water circuit of most hot-water pressure washers. The capillary tube itself is insulated stainless steel, 60 inches long, which gives you flexibility in routing from the panel to the sensing point.

Yes, the 100538 is UL/CSA approved. It carries a 16(4)A-380V electric rating for the burner control circuit it switches.

The capillary tube runs 60 inches from the panel-mounted control to the immersion bulb, which covers typical panel-to-plumbing runs on hot-water skids and trailer units. Measure the routing path on your machine before ordering, and contact APS if you are unsure it fits your setup.

Talk to a real expert

Our equipment experts

150+ years combined on the equipment

Talk to someone who actually knows the machine

Skip the chatbot maze. Call and you get a specialist who can size the right unit, match the exact part, and match the right sealer. Usually faster than figuring it out yourself.

Mon–Fri 8am–5pm ET Family-owned, US-based

Complete the setup

PK-400-VRT3-310-EZ

PK-400-VRT3-310-EZ

$109.99
UV-VRT100-330

UV-VRT100-330

SKU: VRT100-330

$139.99
UV-VRT3-310

UV-VRT3-310

SKU: VRT3-310

$64.99
UV-VRT3-310-EZ

UV-VRT3-310-EZ

SKU: VRT3-310EZ

$64.99