I "Thought" i had a standard open vented system. with gravity fed DHW and pumped CH.
Ive got a FE tank in the loft along with hot and cold tanks.
There are four pipes coming from the boiler.
I decided to drain the system to treat with X400 as some of the rads are quite sludgy. I drained and removed a small rad in the kitchen so i could get a pipe to the outside to drain.
I started draining the system, and noticed the water was crystal clear.
I went upstairs to start opening bleed valves and heard water flowing into my cold water tank, which shouldnt happen.
I closed the valve feeding the hot water tank and now the cold water tank is no longer being topped up.
It seems my radiator pipework is being fed somehow from my hot water supply... im assuming this isnt right.
Is there anything i can do to check whats going on?
TLDR: think my radiators and DHW are using the same water.
Ive got a FE tank in the loft along with hot and cold tanks.
There are four pipes coming from the boiler.
I decided to drain the system to treat with X400 as some of the rads are quite sludgy. I drained and removed a small rad in the kitchen so i could get a pipe to the outside to drain.
I started draining the system, and noticed the water was crystal clear.
I went upstairs to start opening bleed valves and heard water flowing into my cold water tank, which shouldnt happen.
I closed the valve feeding the hot water tank and now the cold water tank is no longer being topped up.
It seems my radiator pipework is being fed somehow from my hot water supply... im assuming this isnt right.
Is there anything i can do to check whats going on?
TLDR: think my radiators and DHW are using the same water.