DN32 Insulation Jacket

This Greenlife DN32 insulation jacket is shaped to fit over a DN32 (1 1/4in) closed circuit filter housing, cutting heat loss from the housing and preventing condensation forming on its casing in a cold plant room. WrekinWater supplies it as a direct like-for-like replacement rather than generic pipe lagging, so it seals properly around the housing's union and valve connections. It suits anyone whose original jacket has perished or gone missing, or who's fitted a new DN32 housing without one.

Signs you need this part

• The existing jacket has split, compressed or gone missing from the housing.
• Condensation forming on the bare DN32 housing in an unheated plant room.
• Noticeable heat radiating from the pipe run around the uninsulated filter.
• A replacement DN32 housing has arrived without its insulation cover fitted.

Because the DN32 housing carries the full temperature of the heating flow, leaving it bare lets heat escape into the plant room and, on colder installations, invites condensation that can drip onto nearby cables or the floor. The jacket is moulded to the DN32 housing's shape, including the union and valve connections, so it insulates properly where a generic wrap-around lagging would leave gaps. It doesn't affect how the filter works, but skipping it means ongoing heat loss and a higher chance of damp problems around the housing.

WrekinWater has served more than 50,000 customers over 15 years as a family-run business from Bettisfield, Shropshire, and holds an Excellent Trustpilot rating. Buying the DN32-specific jacket here means it fits the housing's actual shape rather than a universal cover that leaves the fittings exposed.

How to fit it

1. Isolate the heating system before removing any old or damaged jacket.
2. Clean the DN32 housing casing so the new jacket sits against a dry surface.
3. Fit the jacket around the housing, lining up its cut-outs with the union and valve fittings.
4. Fasten the jacket's straps or closures so it wraps snugly with no gaps.
5. Confirm the union is still reachable for future cleaning of the housing.
6. Return the system to normal use and check for condensation once it's back up to temperature.