No header tank

11 Feb 2007
Reaction score
United Kingdom
My Central Heating system has no header tank. The HW cylinder is directly above the boiler and there is a large header tank for the HW cylinder but no separate header for the CH. The central heating seems to get its water topped up through a 1-way valve in the hot tank or boiler. I can drain the CH and get the dirty liquid out then it fills itself up again from the HW tank but how would I get flushing fluid or anti corrosion fluid into the system?
Sponsored Links
You may have a Primatic cylinder. Might be stamped into the copper!

You would be better changing it !!!

But if you dont then you MUST not put any chemicals into the heating.

Thats unless you want them coming out of your hot taps that is.


DIYnot Local

Staff member

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

Sponsored Links