Crosswater MB1086 2-Way Diverter Cartridge
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Summary
The Crosswater MB1086 is a 2-way diverter cartridge used to control outlet selection in selected Crosswater multifunction shower valve and bath shower mixer assemblies. It is the internal selector cartridge that directs water between two function outlets rather than controlling thermostatic temperature.
This cartridge should be checked when outlet selection becomes stiff, unreliable or incomplete. A common symptom of flow or diverter cartridge failure can be water continuing to drip or pass from a shower head, handset or spout when the shower or tap is turned off. Match the MB1086 part number and measurements before ordering.
Technical Details
| Part number | MB1086 |
|---|---|
| Total length including bottom seal | 54.4mm excluding locating pins |
| Diameter at widest point | 32.3mm at o-ring |
| Brass spindle length including spline | 16mm |
| Top spline diameter | 7.6mm |
| Top spline teeth / notches | 20 |
| Barrel diameter | 31mm |
| Number of function outlets | 2 |
| Distance between locating pins at bottom centre-to-centre | 20mm |
| Locating pins | 2 |
The cartridge may be supplied in different colours. Use the part code, locating pins, spline count and dimensions for identification rather than colour alone.
Confirmed Compatible Models
- Crosswater MB500RM Fusion Multifunction Thermostatic Valve with Fixed Head & 3 Mode Shower Kit
- Crosswater MB510SQ Planet Multifunction Thermostatic Shower Valve with Fixed Head & Single Mode Shower Kit
- Crosswater MBST440D Style Bath Shower Mixer 4 Hole Set with Kit
Installation and Ordering Notes
- Isolate hot and cold supplies before removing the existing cartridge.
- Apply a suitable WRAS approved silicone grease to the o-rings and bottom seals before fitting the replacement cartridge.
- If the original cartridge is damaged, scale-blocked or difficult to remove, compare the valve model and cartridge measurements carefully before ordering.
- If you are unsure whether this is the correct diverter cartridge, send photos and measurements through the Di Vapor part identification service before purchase.
Related Spares You May Need
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- 150mm Universal Shower Hose - NXT734
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.
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