Baxi 105e leaking from grub screw hole

[micpwelsh]

Hi my baxi 105e is leaking from one of empty grub screw holes holding on the diverter valve . It only has 2 screws and 2 empty holes . What seal is likely to have gone ?

 

[ianmcd]

you need to change the front end seal, sometimes called a tail piece, but could also be the small O ring on the diaphragm housing, do you have to top up the boiler pressure ?

 

[micpwelsh]

I usually top up the pressure once a year if it's down . It's only a few drops out of the grub screw hole when the boiler first fires up in the morning.

 

[DP]

Boiler service should fix that

 

[ianmcd]

what you are calling a grub screw hole, there are 4 x holes in the castelated seal, only two are used so the other two are left open, those screws just hold the diaphragm housing in place, they are simply mechanical, ther should not be any water in that joint, but the DHW and the system water are present within there, one is leaking, buy the service kit and change the small O ring and the castelated front end seal at the same time

 

[micpwelsh]

Thanks Ian I will pop to the plumb center on Monday and get a kit . Would it be worth changing the diaphragm while I'm in there ?

 

[ianmcd]

better to buy the complete kit from online, will post a link for the complete kit, you dont have to use everything but as you will have the Diaphragm housing out , I would change it, but make sure you cover the electrical cover with a decent towel, all water runs straight in there with your boiler, and no matter how good you drain everything there will always be some water comes out when you start the job.

https://www.ebay.co.uk/itm/Baxi-Com...177591?hash=item41c0107277:g:QjIAAOSwHAxcJhqF

 

[micpwelsh]

Thank you

 

[micpwelsh]

Hi again , last time I just turned off the water supply to change the diaphragm . Will I also have to isolate the radiators this time ?

 

[ianmcd]

I would change both seals at the same time and to do this you need to drain the boiler, I dont use the boiler isolation valves as they tend to leak after you open them again, you dont need to do anything at the radiators, just the boiler

 

[micpwelsh]

So basically just open the drain on the boiler to drain it . And lots of towels over PCB . Have you seen the price change on that link you posted ? It was £17 when you posted it .

 

[micpwelsh]

https://www.ebay.co.uk/itm/BAXI-COM...0&algv=Default&_trksid=p2332490.c100935.m2460 is this ok ?

 

[ianmcd]

So basically just open the drain on the boiler to drain it . And lots of towels over PCB . Have you seen the price change on that link you posted ? It was £17 when you posted it .

Yep drain the boiler and turn off the cold water supply and open a hot tap and leave it open, you will get those kite easily enough on ebay you dont need to go to that seller there are loads on there, that was just to show you what you need

 

[micpwelsh]

Thank you

 

[micpwelsh]

Hello finally got round to replacing the parts . I don't have any leaks but the pump now sounds different (more of a hissing sound ) . Could this be air in the pump ?