Cold water discharge from vent on f&e!

[dancinplumba]

ok

 

[SafeGasInstall]

Go back , drain down and cut out the cold feed and the vent .
do as dimond says , but keep it in 22
if there is blockage cut and replace
inhibitour in on thw way out

 

[Pooly89]

Go back , drain down and cut out the cold feed and the vent .
do as dimond says , but keep it in 22
if there is blockage cut and replace
inhibitour in on thw way out

I don't know what Dimond means by a combined feed & expansion pipe to be honest as I've never seen or had to put one in. I was intending to cut and replace any sections of blocked pipework, when you say keep it in 22 do you mean up size the cold feed which is 15? obviously I was going to leave as is and just replace any blocked sections.

 

[GasmanxxxR1]

You can run a 22mm pipe as a combined open vent and cold feed or more easily tee the cold feed directly into the open vent higher up.

No the cold feed should not be on the return, as stated before Max of 150mm away from open vent.

Ps theres nothing wrong with the pipework layout as it is. Just a blockage in the cold feed

 

[Pooly89]

Right guys what I have done today to try and narrow this problem down with the spare few minutes i've had is to touch a magnet on the pipe around the cold feed and vent pipework where they meet in the pic. Unsurprisingly the magnet seem to pull toward the section of pipework between the floor and the pump but seemed to really pull towards the T's and the section of pipe in between them I think this maybe where the blockage is I am calling back at another time when I have more time to drain down and remove this section of pipework.

 

[diamondgas]

I don't know what Dimond means by a combined feed & expansion pipe to be honest as I've never seen or had to put one in. I was intending to cut and replace any sections of blocked pipework, when you say keep it in 22 do you mean up size the cold feed which is 15? obviously I was going to leave as is and just replace any blocked sections.

General rule of thumb regards combining f&v, boiler has to have a pump overrun and o/heat cutoff device fitted! You could utilize the existing open vent pipe as the combined pipe, do away with the 15mm feed and increase the tank connection in the expansion tank to 22mm to accommodate the combined pipe! No need for the open vent loop over the top! HOWEVER the boiler must be as said AND it's best to consult the mi's or contact the manufacturer if you're not sure!!

The issue i have with a vent taken off horizontally is the removal of air in the system. It'll trap in the top of the radiators obviously but will never 'vent' naturally!

 

[Pooly89]

Right guys, It seems to have been rectified by removing the blocked pipe work and replacing with new. Cold feed pipe had hardly any space for water to pass through surprised the system worked at all to be honest. thanks for all your advise will definitely come to the site in the future if I need help or can offer help to anyone. Nice one guys, nightmare over.

 

[Simon F]

:smile5:..glad to hear its all sorted...:8: