Anti gravity valve

[sxturbo]

With ongoing issues with my heating.

Having had plumbers round who don't really want to take on the job, I am being left to fix it myself. Not a problem really as I know it will be done properly I suppose.

The last guy that came round, said that if the system was previously a back boiler open vented one, then there may be a check valve somewhere, which is restricting the flow to the upstairs rads.

This does kind of make sense seeing as the return does get hot from the downstairs rads.

After researching check valves are usually put on a vertical pipe, however I have checked vertical pipes and found nothing. Could one have been fitted horizontal?

 

[gas112]

re where it would be .
where ever the old boiler was the anti gravity valve would have been with a couple of feet of boiler on the flow pipe . And yep where on the vertical

 

[sxturbo]

Well this is the million dollar question.

The boiler now resides in the airing cupboard.

My neighbours who have the same house layout without the extension, the boiler is under the stairs, and they have no hot water cylinder.

However some people have also said that there was a boiler in the fireplace

I have had the fireplace apart (to fix a number of bodges) and there is evidence of the walls being smashed through where pipes perhaps once ran,and there is an old gas pipe that's been blanked off. But no water pipes have been seen around the area.
Anyway, all the flow pipes get hot. But not all the returns, so I will assume this is a lost cause searching for a valve.

Will rip all the floors up after Xmas while I'm off work and have a look see what's plumbed into where and how.

 

[Doggit]

Okay, I think we need some history on this. How long have you been in the property, or when did the issue crop up. When you say all the return don;t get hot, do you mean the radiator return valves, or what. If the rad returns don't get hot, is it all of them, some in a particular area, or on one floor; and is it just the returns, or the rads themselves.

As you no longer have a back boiler, it's reasonable to assume that the check valve was removed when the system was upgraded, so I suspect you're looking in the wrong direction for solution.

 

[dilalio]

We’ve had AGV problems before on jobs... was easier to run new F&R pipes from upstairs to down and retire the old ones completely.