Product Description
The CMS Circulation Pump Conversion Kit (40mm to 50mm) is designed to allow seamless replacement of older CMS Gecko circulation pumps with 40mm barrel unions by newer Gecko CMXP circulation pumps with 50mm plumbing, without requiring any modifications to existing spa pipework.
This kit is specifically intended to convert the Gecko CMS circulation pump (0800‑600000) from 40mm connections to 50mm, making it directly compatible with the Gecko CMXP circulation pump (0633400‑2340). By using this conversion kit, installers can upgrade or replace a circulation pump while maintaining correct plumbing alignment and pump positioning.
Pump Dimensions & Alignment Compatibility
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Gecko CMXP Circulation Pump dimensions:
- Height (barrel union to ground): 242 mm
- Length (barrel union to fan casing): 366 mm
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Gecko CMS Circulation Pump with Conversion Kit installed:
- Height (barrel union to ground): 242 mm
- Length (overall): 350 mm
By fitting this conversion kit to the CMS pump, the installed height and alignment closely match that of the CMXP circulation pump. This ensures:
- Correct vertical alignment with existing 50mm plumbing
- Proper clearance for unions and pipework
- No need to cut, raise, or re‑route pipes
- A faster, cleaner installation during pump replacement
Kit Contains:
| Items Code | Part Description | Qty |
| AMOUADAPLT | CMS Pump Base mounting adapter plate | 1 |
| APUMUNIEXT | Union extender for 1.5’’ male pump fittings | 1 |
| APUMKIT152 | Kit of 2 adapters with 2 o-rings. | 1 |
| ABAUN50GEP | Gecko Barrel Union 50mm for Boost Pump and Circ Pump (Set of 2 Barrel Unions) | 1 |
*Pump not included
The included raised base plate lifts the CMS pump to the correct height, compensating for the physical differences between CMS and CMXP pump bodies.
Ideal for servicing, pump upgrades, and retrofit installations, this conversion kit significantly reduces labour time and eliminates unnecessary plumbing work.