I have 2 year old Salamander ESP 75 CPV pump. It seems to work Ok when running, but when shower is not being used and after about an hour the hot water side starts leaking. There us pin hole that gives out very fine spray from the round plastic covering on the end towards the periphery. Do I need another seal, how and what do I order? Is is east to replace or can I seal it with soemthing? Thanks Tiggerchair