Reliance PREL900901 8 Bar Offset Nut Metal Expansion Pressure Relief Valve | Genuine Replacement Spare Part
- SKU
- EDDRELIANCE38
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The Reliance PREL900901 is an 8 bar offset nut metal expansion pressure relief valve from Reliance Water Controls (RWC) — a brand with over 70 years of expertise pioneering pressure and temperature control solutions for the UK plumbing and heating industry. Designed as the primary safety device on unvented hot water systems, this valve automatically discharges water when system pressure exceeds the 8 bar set point, protecting your cylinder, pipework and connected appliances from dangerous overpressure.
The offset nut metal construction makes this valve a robust, long-lasting choice for demanding installations, while the straightforward design ensures quick and compliant fitting by qualified engineers.
Key Features & Benefits:
- Set to 8 bar — activates automatically to relieve dangerous overpressure
- Offset nut design for flexible installation in tight or restricted spaces
- Robust metal construction for durability and long service life
- Manufactured by Reliance Water Controls (RWC) — trusted by UK plumbers and heating engineers
- Essential safety component for unvented hot water cylinder installations
- Helps ensure compliance with unvented system regulations (Part G, Building Regulations)
Technical Specifications:
| Specification | Detail |
|---|---|
| Part Number | PREL900901 |
| Brand | Reliance Water Controls (RWC) |
| Set Pressure | 8 Bar |
| Valve Type | Expansion Pressure Relief Valve |
| Construction | Metal Body, Offset Nut |
| Application | Unvented Hot Water Systems |
Electrical Deals Direct stock a wide variety of spares and accessories for your needs. Whether you're looking for replacements or upgrades, we have you covered. For more details or assistance, feel free to call one of our knowledgeable team members on 01934 253600 or email us - [email protected] - We're here to help!
| MPN | PREL900901 |
|---|---|
| Product Code | EDDRELIANCE38 |
| Compatible With: Product Code (SKU) | Reliance |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Reliance |
| Empty Weight (kG) | 0.5 |
| Full Weight (kG) | 0.5 |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
Reliance PREL900901 8 Bar Offset Nut Metal Expansion Pressure Relief Valve
The Reliance PREL900901 is an 8 bar offset nut metal expansion pressure relief valve from Reliance Water Controls (RWC) — a brand with over 70 years of expertise pioneering pressure and temperature control solutions for the UK plumbing and heating industry. Designed as the primary safety device on unvented hot water systems, this valve automatically discharges water when system pressure exceeds the 8 bar set point, protecting your cylinder, pipework and connected appliances from dangerous overpressure.
The offset nut metal construction makes this valve a robust, long-lasting choice for demanding installations, while the straightforward design ensures quick and compliant fitting by qualified engineers.
Key Features & Benefits:
- Set to 8 bar — activates automatically to relieve dangerous overpressure
- Offset nut design for flexible installation in tight or restricted spaces
- Robust metal construction for durability and long service life
- Manufactured by Reliance Water Controls (RWC) — trusted by UK plumbers and heating engineers
- Essential safety component for unvented hot water cylinder installations
- Helps ensure compliance with unvented system regulations (Part G, Building Regulations)
Technical Specifications:
| Specification | Detail |
|---|---|
| Part Number | PREL900901 |
| Brand | Reliance Water Controls (RWC) |
| Set Pressure | 8 Bar |
| Valve Type | Expansion Pressure Relief Valve |
| Construction | Metal Body, Offset Nut |
| Application | Unvented Hot Water Systems |
Electrical Deals Direct stock a wide variety of spares and accessories for your needs. Whether you're looking for replacements or upgrades, we have you covered. For more details or assistance, feel free to call one of our knowledgeable team members on 01934 253600 or email us - [email protected] - We're here to help!
| MPN | PREL900901 |
|---|---|
| Product Code | EDDRELIANCE38 |
| Compatible With: Product Code (SKU) | Reliance |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Reliance |
| Empty Weight (kG) | 0.5 |
| Full Weight (kG) | 0.5 |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
