Multi-Port Valve
Size: 1.5" · Mount: Top Mount
Available options
- Size: 1.5", 2"
- Mount: Top Mount, Side Mount
Product Code: MPV-T-15
Category: Filters
Made in four versions: top-mount or side-mount, each with 1.5 inch or 2 inch ports. Control unit for managing the pool water system. The top-mount valve seats in the groove on top of the filter with an easy-to-fit two-arm gasket and a port for the pressure gauge. Three pipe connections (pool line, pump line, drain line) plus a bottom connection for the filter tree pipe, 50 mm, with 1.5 inch threaded heads on the three connections. The lever selects six positions: filtration, backwash, rinse, waste, recirculation and closed.
Specifications
| Mount | Top mount |
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| Port size | 1.5 inch threaded (3 ports) |
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| Valve positions | 6-way — filter, backwash, rinse, waste, recirculate, closed |
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| Pressure gauge port | Yes |
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| Filter tree connection | 50 mm |
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Availability: Made to order
Frequently asked questions
What do the six positions of the multiport valve do?
Filter (normal running), Backwash (reverses flow to flush the bed to waste), Rinse (re-settles the bed for 20–30 seconds after a backwash), Waste (drains the pool or vacuums heavy dirt straight to drain, bypassing the filter), Recirculate (circulates without filtering, used when dosing) and Closed. Always stop the pump before moving the handle.
Which multiport valve fits my filter?
MPV-T valves are top-mount, for the Waterstar T-series residential filters; MPV-S valves are side-mount. Both come in 1.5 inch and 2 inch — choose the size of your pump and pipework. All are 6-way with a pressure-gauge port; the MPV-T-15 connects to a 50 mm filter tree.
Which sand grade goes where?
0.4–0.8 mm silica sand (FM-4-8-25) is the filtration layer used in every Waterstar filter. 0.8–1.2 mm (FM-8-12-25) is the intermediate layer specified on some commercial filters between the 1–2 mm gravel support bed and the fine sand. Never substitute building sand — it is neither washed nor graded and will channel.
How often should the sand be replaced?
Every few seasons, or sooner when backwash intervals get shorter, the water stays cloudy after a backwash, or the bed has channelled or formed mud balls. Replace the full charge with the grade on the filter's data sheet and rinse the new bed before the first filter cycle.
