Very weird central heating sludge/blockage - definitely not magnetite!

Weezel · 2026-01-13T18:09:47+0000

I've got some seriously weird crap in my central heating (only been in the place a few weeks so don't know history). It looks like some form of silicone lubricant. Has anyone seen anything like it? Must have pulled out about 250ml so far. Power flush guy was at a loss as to what it was or how to flush it out properly. It seems to be mixing with magnetite to totally block some sections. Really hoping someone knows a chemical that might break it up, otherwise it looks like pipe cut out time

Pic shows when I emptied the return filter!

CountryFan · 2026-01-13T19:54:07+0000

Looks the same consistency as Sentinel rapid dose leak sealer.

Exedon · 2026-01-13T21:24:12+0000

Another vote for some sort of leak sealant
Needs to be flushed out!

Weezel · 2026-01-13T21:38:52+0000

Powerflush guy reckoned he couldn't flush it. Any ideas what chemical I can use to break it up?

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Very weird central heating sludge/blockage - definitely not magnetite!

Weezel

Attachments

CountryFan

Exedon

Weezel

DIYnot Local

Similar threads