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    • Plumbing Valves & Stopcocks Caleffi - 1/2" Series 309 Pressure & Temperature Relief Valve Set at 90°C - 10 Bar - 309400 CST

    Caleffi - 1/2" Series 309 Pressure & Temperature Relief Valve Set at 90°C - 10 Bar - 309400 CST

    061-475-0703

    £40.93 inc. VAT

    £34.11 ex. VAT

      Typically available within 3-5 working days

    • The Caleffi Series 309 Pressure & Temperature Relief Valve is a safety-critical mechanical fail-safe designed exclusively for unvented domestic hot water storage cylinders. Its primary function is to protect the structural integrity of the hot water tank by preventing the stored water from reaching a critical boiling state. If system safety controls fail and temperature or pressure thresholds are breached, the valve activates automatically, discharging a controlled volume of water to lower system energy and safely restore stable operating conditions.

      • Temperature setting: 90°C
      • Pressure Setting: 10 Bar
      Brand
      Caleffi
      Category
      Pressure & Temperature Relief Valve
      Product Code
      061-475-0703
      Main Material
      Dzr Brass
      Main Colour
      Gold
      Box Quantity
      1
      Weight
      255 g
      Width
      55 mm
      Height
      190 mm
      Diameter
      30 mm
      GTIN
      0708747450699

    • Collect in-store

      Collection is available between 7:30 am and 4:30 pm.

      Please bring your order confirmation/number with you on collection.

      Please wait for us to contact you before making your way to collect your items.

      We will hold your order for 1 working week before returning the items.

      Estimated collection Thursday 29th.

    • Our delivery policy

      We will deliver goods as soon as we can. An estimated delivery date will be provided on the checkout pages. For stock items, this may be as soon as the next day; for out-of-stock items, it may take a day or two longer.

      £5 standard delivery across the UK for most products on our website, with free delivery on orders above £100 for customers within 10 miles of our Welwyn Garden City location. Some larger items may incur an additional surcharge to cover our delivery costs.

      See our 'Terms of Sale' for more information on our delivery policy.

      Doorstep delivery only.

      Order before 2.00pm for estimated delivery between Tuesday 27th and Friday 30th.

    • Our returns policy

      See our 'Terms of Sale' for more information on our returns policy.

      Restocking charges apply.

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