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🛠️ Engineered to protect, built to last — don’t let pressure catch you off guard!
The Watts 0371271 530C is a lead-free brass poppet style pressure relief valve designed for precise pressure management in water, oil, and air systems. Featuring a calibrated adjustment for pressure settings between 50-175 psi and a max rating of 300 psi, it combines durable materials like stainless steel springs and Buna-N seals to ensure long-lasting, leak-proof performance. Ideal for professionals demanding reliable system protection and compliance with industry standards.
| Asin | B000936L24 |
| Best Sellers Rank | #252,753 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #293 in Relief Valves |
| Brand Name | Watts |
| Connector Type | Threaded |
| Customer Reviews | 4.2 4.2 out of 5 stars (100) 4.2 out of 5 stars |
| Exterior Finish | Bronze |
| Inlet Connection Size | 0.75 inches |
| Inlet Connection Type | National Pipe Tapered |
| Item Dimensions | 3.8 x 2.3 x 1.5 inches |
| Item Type Name | 1/2" Poppet Style |
| Item Weight | 7.36 ounces |
| Manufacturer | Watts |
| Manufacturer Part Number | 1/2 530-C |
| Material Type | Bronze |
| Maximum Pressure | 300 psi |
| Model Number | 1/2 530-C |
| Number Of Items | 1 |
| Number Of Packs | 1 |
| Number Of Pieces | 1 |
| Number Of Ports | 2 |
| Outlet Connection Size | 0.5 inches |
| Outlet Connection Type | MNPT |
| Size | 0.5 Inch |
| Specification Met | ASME |
| Thread Size | 1/2" |
| Thread Type | NPT |
| Unit Count | 1 Count |
| Upc | 098268018233 |
| Valve Type | Pressure Relief Valve |
User
Quality valve
The valve was of good quality and the plumber commented on it. So far all good.
User
Good product
Pressure relief on hot water system. The last like this lasted over twenty years but is now leaking slightly. Good service life
User
Know what you are buying
I was experiencing strong pressure oscillations under changes in flow. I bought this device hoping to stamp out the oscillation. It kind of helped but it streams water continuously out the bypass. This is not “California Friendly”. Reading the instruction manual carefully, it does exactly what it is supposed to. I returned the device and bought piston pulsation dampener.
User
Wish these were cheaper.
Used for a coolant bypass on my 04 cummins. Wish they were cheaper but works great. So far so good.
User
Leaked within 2 months
For such an expensive product it sucks that it started leaking within 2 months. With house psi of 60, water would come out when valve was at 100
User
Nice
Easy to install and setup
User
Pressure relief valve
Extremely fast shipping.Played with pressure adjustment. Markings may not line up exactly with actual pressure needed to open the valve but it's close enough. I can finally rest at ease because I was able to easily adjust it to the range I need.
User
Contains lead.
Contains lead. Apparently not allowed for plumbing applications in California.Other than that, it's adjustable.
User
Quality
Excellent product 👍
User
Nice, but expensive
Accurate enough and good quality
User
no visual indicator if open or closed
minor negitive issues no visual indicator if open or closed and you need a pair of plyers to turn and adjust the presssure setting.Also would have been better if the outlet was also 3/4" NPT male the same as the inlet.Minor thing you just have to add and adapter.Then you can just attach flexible hoses for easier replacement or repair.On a positive note the relief valve works great.Set at the lowest setting (50 psi) works great in my house's hot water recirculating system with pex plumbing.I would recommned it.
User
Brass arrived cracked inside thread cutting.
Arrived with a visible crack inside the cut pipe thread at point of manufacture.Currently waiting its replacement.
Trustpilot
2 weeks ago
1 month ago