



🔥 Stay cool, stay efficient — protect your pump like a pro!
The General Pump 1/2" Pump Thermal Protector #100558 is a compact, brass-built valve designed to prevent heat damage by releasing hot fluid during bypass mode and allowing cooler water to cool the pump instantly. Made in the USA and certified to CSA and ULC standards, it fits standard 1/2 inch NPT connections, ensuring reliable, long-lasting pump protection.
| Material | Brass |
| Brand | General Pump |
| Item dimensions L x W x H | 2.8 x 1.5 x 2 inches |
| Inlet Connection Size | 1/2 Inches |
| Inlet Connection Type | National Pipe Tapered |
| Outlet Connection Type | NPT |
| Number of Ports | 2 |
| Outlet Connection Size | 0.5 Inches |
| Specification Met | CSA, ULC |
| Global Trade Identification Number | 00682491014423 |
| Manufacturer | General Pump |
| UPC | 682491014423 |
| Part Number | 100558 |
| Item Weight | 1.76 ounces |
| Product Dimensions | 2.8 x 1.5 x 2 inches |
| Item model number | GNPMP-100558 |
| Is Discontinued By Manufacturer | No |
| Color | Black |
| Style | 1/2" |
| Item Package Quantity | 1 |
| Included Components | Thermal Protector Valve |
| Batteries Included? | No |
| Batteries Required? | No |
D**E
Works like new
Worked perfect. 3000 mi-t-m pressure washer works perfect now,my old one got damaged and spewed water everywhere. Perfect fit and function. A+
T**.
Perfect Fit
Exactly the right part when we needed it, great Amazon stocking and delivery service.
S**O
Good Product
Fit and functioned as advertised.
C**R
You'll know if you need this
Got a Mi T M that someone was selling and was told that it would cost $200 to fix. Cleaned it up and replaced the thermal protector that was destroyed. This is a top quality product.
D**N
This part fit perfectly to keep my pressure washer up and running
The part was exactly what I needed for my pressure washer to keep up and running
J**N
Four Stars
Good price any the right part.
D**K
worked perfectly with my pressure washer
Old valve was totally gone on the inside. This one worked liked a charm on my Cat pump 3500 psi, 4gpm pressure washer. Ordered a second one as backup. Quick delivery on both.
P**R
Good direct replacement
A direct replacement for a leaky valve on my 4000 psi 4.5 gpm cat pump. Works flawlessly.
Trustpilot
2 weeks ago
2 months ago