Go here and type o-ring in the search. http://www.mcmaster.com/ You will
find more choices than on person can handle at any one time.

Get very accurate on the cross section diameter and measure the inside and
outside of the o-ring. If it is broken you may need to measure the length
and do some geometry math to determine the diameter. If all else fails call
a local bearing/mechanical supply house they can get rings custom made. You
will have to decide if the price of a custom o-ring is better than replacing
the filter. Good luck.




"John Keiser" wrote in message
...
I know this is off-topic but you folks are very clever and may have a
solution.

My swimming pool sand filter is 30 years old. Parts no longer available.
The valve has begun to leak from a "spider" gasket - basically an 8 inch
"O" ring and a "1 inch "O" ring connected by 3 radials [which separate
rinse/filter/backwash chambers]. The gasket must allow the valve body to
rotate to the three positions so I doubt anything as simple as silicone
caulk would work.
No comparable part available AFAIK.
Replacing the sand filter would not only be pricey, but labor intensive.
Does any one have experience making [or piecing together] such a gasket?
Or a link that might help?
Thanks for any wisdom.
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