Hydrovalve Grease Plate Main Drain Cover – Concrete Pools 320mm (SK-D1629)

The Hydrovalve Grease Plate Main Drain Cover — SKU SK-D1629 — is a main drain fitting designed for concrete swimming pools. The flat lid design allows the pool builder or owner to fill the lid with the same surface material as the rest of the pool (pebble, render, or tile grout), creating a seamless, flush finish that blends the main drain into the pool floor. A central grease nipple allows the internal valve mechanism to be lubricated without removing the lid.

Dimensions

• Overall diameter: 320mm
• Lid diameter: 280mm
• Slip (socket) diameter: 230mm

Product Details

• SKU: SK-D1629
• Barcode: 552423
• Brand: Poolstore Hydro
• Colour: White
• Application: Concrete swimming pool main drain
• Lid fill: Compatible with pebble, render, and tile grout finishes

Frequently Asked Questions

What is a grease plate main drain and how is it different from a standard drain cover?

A grease plate main drain has a flat, recessed lid that is designed to be filled with the same surface material as the pool floor — such as pebblecrete, render, or tile grout — so the drain blends seamlessly into the pool surface. A standard drain cover has a visible grate or decorative face. The grease plate style is popular in pebble and render pools where a flush, invisible finish is preferred. The central grease nipple allows the internal valve to be serviced without disturbing the surface fill.

Is this suitable for fibreglass or vinyl pools?

No — this grease plate main drain is designed specifically for concrete swimming pools. The slip socket connects to the concrete pool plumbing during construction. It is not suitable for fibreglass or vinyl liner pools, which use different drain fitting systems.

What size pipe does this connect to?

The slip (socket) diameter is 230mm, which accepts the corresponding pipe or fitting during pool construction. Confirm your pool plumbing specifications with your pool builder before ordering to ensure the correct size.

What does the grease nipple do?

The central grease nipple on the lid allows you to inject grease into the internal valve mechanism using a grease gun, lubricating the moving parts without needing to remove the lid or disturb the surface finish. This is important for maintaining smooth valve operation over the life of the pool.