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🔧 Pressure perfected, installation perfected — don’t get left behind!
The Caleffi Pressure Relief Valve 311501 is a high-quality, stainless steel valve designed to safely regulate system pressure up to 6 bars. Featuring a 3/4" loose nut to 1/2" BSP thread connection, it offers quick, tool-efficient installation ideal for direct replacements. Backed by a 12-month warranty and a 4.7-star rating from over 140 users, this valve ensures reliable performance and durability for professional-grade plumbing systems.
| ASIN | B01GFTLTG8 |
| Best Sellers Rank | 35,413 in DIY & Tools ( See Top 100 in DIY & Tools ) 33 in Water Heaters & Parts |
| Brand | Caleffi |
| Customer Reviews | 4.7 out of 5 stars 141 Reviews |
| Exterior Finish | Stainless Steel |
| Exterior finish | Stainless Steel |
| Inlet Connection Size | 1/2 Inches |
| Inlet Connection Type | Female Iron Pipe |
| Inlet connection size | 1/2 Inches |
| Inlet connection type | Female Iron Pipe |
| Manufacturer | Caleffi |
| Manufacturer Warranty Description | 12 months. |
| Material | Metal |
| Maximum Pressure | 6 Bars |
| Model Number | 311501 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Ports | 6 |
| Outlet Connection Type | BSPT |
| Outlet connection type | BSPT |
| Part Number | 311501 |
| Size | 3/4 inches |
| Specification Met | CE |
| Thread Size | 3/4 inches |
| Thread Type | NPT |
| Unit Count | 1.0 count |
| Valve Type | Pressure Relief Valve |
A**S
Quick and easy to fit direct replacement.
Genuine quality item. Caleffi Pressure Relief Valve 6-Bar. Ensure your water is off at the main stopcock and the pressure has released from your system - we opened the cold taps to ensure this. plenty of towels at the ready around the area "just in case" but there was only a minor trickle when I removed the original defective unit. Cleaned the surface of the pipework to make sure the 2 would create a seal. Joined and tightened on both sides. Gently brought the water back up to normal pressure and checked for [no] drips. Job done! Allow an hour, but it could be done within 20 mins. Only One tool required for the job. I used an adjustable Wide-Jaw wrench/spanner similar to this one https://amzn.eu/d/j3FKatZ As a Prime member it arrived the same day!
J**.
Cost effective solution
Good solution to replace failed valve without having to change the full valve assembly
T**Y
Good
Works
A**R
Does the job
Arrived promptly and straightforward to fit. Had worked reliably for over a year now.
D**.
Good quality
Value for money
A**R
stop safety relief valve leaking
This was easy to fit and worked well. The safety relief valve was leaking on our water supply pressure control valve, because we live in a hard water area, and limescale built up on the rim, or seating of the valve, after only 8 months of use. I hope the replacement works for longer now we have a water softener.
O**E
Fauled in use.
Leaking after 14- months!
G**P
Straight swap for existing
This was very easy to fit since it's identical to the original. Finding which PRV is leaking into the tundish is more difficult !
Trustpilot
1 month ago
3 weeks ago