Phoenix metro, 11K gallon saltwater 1 HP whisper flow.
after 8 years(yeeees without a sand change) my S310T has not been filtering well. Multi-port valve has developed some cracking in several spots as well.
I removed the "head" today and found the the down-tube of the distributor was also broken ( top 1 inch was cracked and pieces broke off when i barely touch them) so THAT will get replaced as well. we will see what the laterals look like after the sand is removed( going to replace the entire unit, just curious of the condition)
So my question is this...should i or can i only replace the multi-port with the same exact valve or should i consider a different valve( may be something newer/better). (2Inch only)
What are the general thoughts on zeobright or zeosand type media?
A. are they worth the extra money?
B. they claim to only need 1/2 the poundage to work correctly. is this true?
is there a best online source for parts?
Any other advice?