All connections are tight and air tight. The connectors went in with Permatex non hardening sealant
on the threads......I will lube the O-ring with some silicone lube.....I know that this is dangerous as many silicone lubes contain petrolium which my membaranes will NOT LIKE...... I have a little Katadyn
Silicone lube so in extremis I can use that.
Any other suggestions as what to use to lube the O-ring seal on the Pre-Filter Bowl.
At the next test i will immerse the whole filter bowl in a bucket of sea water
- that should eliminate - and highlight that we have a problem with air ingrees from the pre filter area OR NOT as the case may be.