Ametek Model PSCL-00 O ring

[barry s]

I have an ametek PSCL-00 Water Filter Housing (maybe this is the number of the screw on clear plastic filter container, not the filter unit model number) installed (in 1992) in a Summer cottage. The house has not been used for about 18 months at which time all water from pipes (including filter) was drained. When I turned the pump on last weekend I noticed the filter leaking. I assumed I had not reinstalled the screw on plastic housing tightly. Using the 'circle' wrench I had to rap it to get it to unscrew. It still would not turn freely. Finely it freed up and water sprayed from the inlet side. I had failed to turn off the pressure tank. I could see no crack in the plastic by the inlet pipe. I only brought home the clear plastic housing. I wonder if the housing or the O ring just seized from being dry for so long. Can I get a new O ring? Do I need to replace the whole unit because of its age. Your help would be appreciated.