![A Complete Guide to Pipe Fittings and How to Use Them to Connect PEX, PVC and Copper Tube - Dengarden A Complete Guide to Pipe Fittings and How to Use Them to Connect PEX, PVC and Copper Tube - Dengarden](https://images.saymedia-content.com/.image/ar_1:1%2Cc_fill%2Ccs_srgb%2Cfl_progressive%2Cq_auto:eco%2Cw_1200/MTc0MzQ4MzA3MzcwODc4NTk4/types-of-plumbing-fittings-joining-pvc-and-copper-pipe.jpg)
A Complete Guide to Pipe Fittings and How to Use Them to Connect PEX, PVC and Copper Tube - Dengarden
![Homewerks Worldwide 1-in Schedule 40 PVC Coupling in the PVC Pipe & Fittings department at Lowes.com Homewerks Worldwide 1-in Schedule 40 PVC Coupling in the PVC Pipe & Fittings department at Lowes.com](https://mobileimages.lowes.com/productimages/8fc4d854-f7d4-438f-b1eb-f17a8a0f6a11/03671066.jpg)
Homewerks Worldwide 1-in Schedule 40 PVC Coupling in the PVC Pipe & Fittings department at Lowes.com
![Need advice. No matter what, the compression coupling leaks thats connected to the cast iron. I have decreased,sanded ,filed and bought 20" pliers to tighten the coupling to no avail. No water Need advice. No matter what, the compression coupling leaks thats connected to the cast iron. I have decreased,sanded ,filed and bought 20" pliers to tighten the coupling to no avail. No water](https://preview.redd.it/need-advice-no-matter-what-the-compression-coupling-leaks-v0-1nm4ak4mb9da1.jpg?auto=webp&s=2c35932d2facdff937ce3b7a4bad78a516c93ce0)
Need advice. No matter what, the compression coupling leaks thats connected to the cast iron. I have decreased,sanded ,filed and bought 20" pliers to tighten the coupling to no avail. No water
![Is this compression fitting supposed to have an o-ring gasket? Right now the seal is just pvc-on-pvc. I have tape on the threads but that's won't stop water from leaking past the Is this compression fitting supposed to have an o-ring gasket? Right now the seal is just pvc-on-pvc. I have tape on the threads but that's won't stop water from leaking past the](https://preview.redd.it/is-this-compression-fitting-supposed-to-have-an-o-ring-v0-8j3qtjtqn9791.jpg?width=640&crop=smart&auto=webp&s=ab392a658e6d821d157955ff5d51b2e128b5f49c)