Unvented under sink heater

[Matt0029]

Anyone seen a valve for a small undersink unvented cylinder that incorporats the pressure relief and expansion that goes out though the hot tap. I will try take a picture tomorrow. Thanks
[automerge]1579473384[/automerge]

 

[JCplumb]

The bit you want comes with vented taps, not cheap. I know Heatrae Sadia do them.
Heatrae Sadia UK Spares - Heatrae Sadia TXH02 Vented Pillar Hot Tap - https://www.heatraesadiaukspares.com/index.php/heatrae-sadia-txh02-vented-pillar-hot-tap.html

 

[ShaunCorbs]

Dripper tap it’s a standard fibre washer on top that’s probably failed