O rings for Sika flow switch

[WHPES]

Does anyone know the size for the O ring used in the Sika flow switches for combi boilers?

 

[SimonG]

Never really took a lot of notice, always thought they where more oval or squarer than round. Must admit never had to change the o ring, the only ones I've changed is when it leaks down the cable and drips onto the high limit stat on the worcesters. I always cut back the outer sheath so it cant repeat it.

 

[WHPES]

I have had a few dripping. Often you can shove a rubber shower hose washer in between the switch and the fitting to stop leaks but there's one here which won't work.

 

[SimonG]

How about 1/2" fibre washer and paste on top of o ring until longer term solution?
I need to find some o rings for the danfoss stems.