I have a problem with DE blowing into my pool. I have a 48 foot Hayward filter. I know it happens when the filter is on. I replaced the elements as they were old and I thought this was it. When I replaced the elements, I noticed some small cracks in the manifold. First I used marine epoxy on the cracks. When this did not stop the DE leak, I replaced the manifold. It still leaks. Before I go in and replace the o-ring on the inside pipe to the manifold, is there anything else it could be? Could it be the multiport valve?
One last thought. I read somewhere that you should only tighten the nut on the rod that holds the manifold to the elements slightly. I tightened it some more after the last breakdown but this did not seem to help. Maybe I didn't tighten it enough? Is there any way to tell when it is tight enough? I could use any thoughts or help anyone can give. Thanks.
One last thought. I read somewhere that you should only tighten the nut on the rod that holds the manifold to the elements slightly. I tightened it some more after the last breakdown but this did not seem to help. Maybe I didn't tighten it enough? Is there any way to tell when it is tight enough? I could use any thoughts or help anyone can give. Thanks.
As far as tightening the nut, tighten it so that all the grids are secure and the fabric is at least touching the manifold. A cracked manifold will allow DE back into the pool. You may also want to check the 'spider gasket'/ 'wagon wheel' in the multiport!