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Sirrus SK1503-2LP Thermostatic Cartridge Assembly for TS1503 and 1500 Series Shower Mixer Valves Sirrus SK1503-2LP Thermostatic Cartridge Assembly for TS1503 and 1500 Series Shower Mixer ValvesSirrus-SK1503-2LPSirrus SK1503-2LP Thermostatic Cartridge TS1503SK1503-2LP Replacement Cartridge

Sirrus SK1503-2LP Thermostatic Cartridge Assembly for TS1503 and 1500 Series Shower Mixer Valves

Part Number: SK1503-2LP

SALE: £103.37

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Product description


This is a genuine Bristan Sirrus SK1503-2LP Thermostatic Cartridge Lever Cartridge Kit Assembly for TS1503 and 1500 Series Shower Mixer Valves.

Sirrus Bristan SK1503-2LP General Information

Manufacturer: Bristan
Product: SK1503-2LP Thermostatic Cartridge Assembly
Installation: Screw In

This genuine Bristan Sirrus shower spare is compatible with shower mixers:
– Java Thermostatic Bath Shower Mixer
– RW153HC Reliance Thermostatic Shower Valve
– TS1500 Sirrus
– TS1503CCP Sirrus Opac
– TS1503ECP-LV Sirrus
– TS1503ECP Sirrus Opac
– TS1503SCP-LV Sirrus

The cartridge assembly includes:
– Cartridge
Wax Thermostat Element
– Shuttle Piston
– Spring
– O-Ring (2)
– Allen Key
– Silicone Grease

Bristan SK1503-2LP Assembly Instructions

SK1503-2LP was previously known as the discontinued SK1500-2. The difference between the old and new version lays in the marginally bigger spindle of the SK1503-2LP. If your shower comes with the old SK1500-2, you can interchange the spindles to make it fit in your valve correctly.

Assemble this Sirrus shower spare part by inserting the wax thermo-element in the cartridge, followed by the shuttle, and then insert the spring under the shuttle.

Replacing the SK1503-2LP thermostatic cartridge assembly for Bristan Sirrus Gummers TS1500 Shower Valve

Plug the drain to keep the parts from tumbling in. Completely isolate water supply lines to prevent accidental hot water flow.

1. Turn the shower off and disassemble your shower valve handle. The method will depend on the handle you have. Take the handle (or lever) out and undo the handle cap screw.
2. Flip the front cap out using a thin and flat tool or screwdriver.
3. Remove the center screw with the help of an Allen key. Watch that the small O-ring does not fall on the bathroom floor.
4. Slide the plastic knob out. Then pull the shroud out together with the retaining ring.

5. Grip a wrench on the hexagonal nut of the cartridge. Turn it anticlockwise to loosen and withdraw the cartridge along with the wax capsule, the shuttle slider, and the spring.
6. Replace the O-rings situated in the TS1500 shower unit.
7. Apply a pea-size amount of silicone grease on the O-ring of the new SK1503-2LP cartridge.
8. Insert the assembled thermostatic cartridge in the valve and turn it clockwise to secure.

9. To begin reconstructing the valve, push in the shroud – make sure the single ridge on it is positioned at 12:00 – and the retaining ring back in place.
10. Slip the plastic knob back. The “off” indicator on the knob dial must point at 12:00.
11. Insert the tiny O-ring on the screw and screw the plastic knob in place.
12. Calibrate the temperature if desired.
13. Refit the front cap. And reassemble the shower handle.
shipping & Returns


  • Delivery of this item is priced as a 'small' packet. UK delivery costs £5.95.
  • 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 3.30pm, Monday - Friday.
  • Next day delivery is available to select at an additional charge during the checkout.
  • We delivery WORLDWIDE. For more information about international deliveries, read our delivery page.


  • If you need to return a part then please telephone Di Vapor on 0121 705 0866 with the reasons for the return within 14 days of receiving the goods.
  • For more information please see our terms and conditions.
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