Polylok 4" Extend & Lok™ for Effluent Filters

Fit as expected, strong and easy to install

Worked good.

These are awesome. Saved my butt big time when the output Terra cotta busted right off. Let the tank dry out for a day, jumped in and used a 2x4 do gently seat it, but my sanitary tee on and hasn’t moved a bit. Life saver.

Considered other fittings but this one does the job without any rigging. Fast shipping, fit perfectly, and made diy job quick & easy

This is awesome! Made repair of broken filter on septic tank so easy.

Living in the country with only a septic I had to buy this. My outlet in my septic broke after years of use (about 40 years) I bought this to insert inside my pvc drain and attached a 90 degree fitting to revamp my septic. I replaced my drain fill as well and all is working good now.

Exactly what we needed. We purchased several items based on a diy youtube video on replacing a ballast in a septic tank. This piece worked perfectly.

It seems to have solved my problem. It seemed sort of thin compared to the sch. 4 that i attached to it. I added a wire to support holding up the whole assembly.