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SK1850-1 Seal Kit (1850 / 968 Models) for Sirrus, Bristan and Gummers Thermostatic Cartridges

Part Number: SK1850-1

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Product description


Replacement SK1500-1 seal kit for servicing Sirrus, Bristan and Gummers thermostatic shower cartridges.

The seal kit includes what you can see in the photo. The kit doesn't include hard white plastic spacer washers as this part rarely falters.

This seal kit is designed to replace the seals on the following thermostatic cartridges:
- Sirrus 1850 shower valve models
- Sirrus 968 shower valve models
- Sirrus SK1850-2
- TS 1850 / TS1850

Number of O rings: 15
Number of E clips and circlips: 3

This seal kit is often bought with the The wax element which is used in this cartridge can be found here:
- Sirrus SK1500-3 Thermostat and Piston.

Postage within the UK will cost £1.95 for this seal kit.

Common Questions Regarding the SK1850-1 Seal Kit

Question: I have a dripping shower. The shower won't turn off completely and subsequently the shower doesn't have a full flow either when it is turn on to its fullest. So my question is will this seal kit solve my leaking issue?
Answer: It sounds like the leaking is caused by o-rings which have failed. Replacing the seals should fix your leaking issue. The kit has enough seals to replace every single seal on the cartridge as well as some left over for the future should you need them again.

Question: My shower is leaking from around the thermostatic cartridge part of the valve. Do I need a new cartridge or do will this seal kit fix the problem?
Answer: It depends whether your shower is regulating water temperature correctly. If there is no issue with the water temperature being regulated properly then the isuue is probably one of the seals. The seals can deteriorate over time, so you'll have to replace the seals. This kit will hopefully fix the leak.

Question: My Sirrus 1850 shower is 9 years old. It has recently started to drip from the front of the shower valve. I've asked my plumber and he looked at the pipes around the back of the shower and they are fine so I'm wondering whether it is these seals that I need?
Answer: It sounds like the issue is a faulty seal. This seal kit should do the job and stop the leak.

Question: What thermostatic cartridge can this kit be used to servie?
Answer: The SK1850-1 can be used to service any Sirrus / Gummers / Bristan valves which are in the 1850 and 968 ranges.

Question: Can I just buy the e clips from this set?
Answer: Unfortunately not as it comes as a complete set.

Question: I only wasnt a few of the o rings. Can I buy specific o rings?
Answer: You will have to buy the complete set as it isn't sold in pieces.

Question: I don't have a thermostatic version of the 1850 cartridge. Will this kit work for servicing the non thermostatic version?
Answer: Yes, this kit will service both the thermostatic and non thermostatic version of this shower cartridge.

Question: I need the plastic shuttle and brass was thermostat. Do you also sell these?
Answer: Yes, the piston and thermostat that is used in the cartridges that this seal kit services is the Sirrus SK1500-3 Thermostat and Piston.

This SK850-1 service kit is used on the thermostatic cartridge in the following shower valve models:
- NewTeam IKON Super Thermostatic
- Sirrus 1850 / 1850 Dual Shower Valve (including Sirrus Stratus 1850)
- Sirrus 1850 Dual Control - Thermostatic Valve
- Bristan Damixa Saturn-T Mixer Shower
- Sirrus Heritage Dual Control
- Bristan 1901 Therm - Rigid Riser & Divertor Chrome N SHXDIV C
- Sirrus Mayfair Dual Control
- Shires Thermostatic C2000 - E2000
- Redring Dual Thermostatic
- Showerforce Vienna T
- Victoriana Thermostatic Valve
- NewTeam 968 Thermostatic Valve
- Sirrus Ts 1850 Antique
- Sirrus Tre Mercati Antique
- Bristan Tulsa Thermostatic Shower With Adjustable Riser - Chrome - Galaxy Nova
- NewTeam Victoriana Thermostatic Valve
- Showerforce 998 T
- Mayfair Antique Dual Control
shipping & Returns


  • Delivery of this item is priced as a 'extra small' packet. UK delivery costs £1.95.
  • 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.
Payment & Security

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