Bristan 131-309-S Pressure Relief Diaphragm Housing Assembly for SM/TH/GL/JOY/BL
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Summary
Product Overview
The Bristan 131-309-S Pressure Relief Diaphragm Housing Assembly is a genuine Bristan spare part designed to house the pressure relief diaphragm within compatible Bristan electric showers. It supports the internal pressure relief mechanism and helps maintain safe performance where the original housing has cracked, leaked, or deteriorated.
Function & Use
This pressure relief diaphragm housing holds the diaphragm element inside the shower valve body to safely relieve excess pressure and protect internal components. Replacement is typically required when water leaks around the housing, the diaphragm fails to seat correctly, or the housing shows signs of physical damage.
Key Features
--Genuine Bristan pressure relief diaphragm housing assembly
--Designed to support the internal pressure relief diaphragm
--Durable construction for long service life
--Essential safety-related spare for electric showers
Confirmed Compatible Models
--Bristan Bliss Electric Shower 10.5kW Black
--Bristan Bliss Electric Shower 10.5kW White
--Bristan Bliss Electric Shower 9.5kW Black
--Bristan Bliss Electric Shower 9.5kW White
--Bristan Bliss MK1 Electric Shower
--Bristan Bliss MK2 Electric Shower 8.5kW Black
--Bristan Bliss MK2 Electric Shower 8.5kW White
--Bristan Cheer Electric Shower 8.5kW White
--Bristan Cheer Electric Shower 9.5kW White
--Bristan Glee Electric Shower 10.5kW Black
--Bristan Glee Electric Shower 10.5kW White
--Bristan Glee Electric Shower 8.5kW Black
--Bristan Glee Electric Shower 8.5kW White
--Bristan Glee Electric Shower 9.5kW Black
--Bristan Glee Electric Shower 9.5kW White
--Bristan Glee MK1 Electric Shower
--Bristan Glee MK2 Electric Shower
--Bristan Joy Electric Shower
--Bristan Joy ThermoSafe Electric Shower
--Bristan Joy Thermostatic Electric Shower 8.5kW Metallic Silver
--Bristan Joy Thermostatic Electric Shower 8.5kW White
--Bristan Joy Thermostatic Electric Shower 9.5kW Metallic Silver
--Bristan Joy Thermostatic Electric Shower 9.5kW White
--Bristan Smile Electric Shower
--Bristan Smile Electric Shower 9.5kW White
What’s Included
--One Bristan 131-309-S pressure relief diaphragm housing assembly
Installation Notes
Isolate the water and electrical supplies before replacing the pressure relief housing. Remove the shower cover to access the old housing, detach it, and install the new 131-309-S assembly, ensuring the diaphragm and seals are correctly positioned for leak-free operation.
Fast delivery
- UK delivery: £5.95 incl. VAT for this small packet item.
- For all in-stock spare parts the typical UK delivery timescale is 2-5 working days.
- If you need a part urgently then we can provide a next-day (delivered Mon-Fri) UK delivery service for all in-stock small parcels ordered before 3.00pm, Monday - Friday.
- Next day delivery is available to select at an additional charge during the checkout.
- Worldwide delivery available — see our delivery page for details.
Returns
- 14 days 'risk-free' returns.
- Start a return within 14 days of receiving your order by calling 0121 705 0866 or using our contact page.
- Full returns information is available in our terms and conditions.
Payment methods
We accept the following payment methods:
- Card payments: Visa, Mastercard, Maestro, Discover, JCB, Diners Club and EnRoute
- PayPal
- American Express: available via PayPal guest checkout only
- BACS bank transfer
- Cheque: dispatch takes place once payment has cleared
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