Does the Compression F Connectors w/O-Ring in the bottom of the connectors treads really make a difference for outdoor use ? My installer did not use these. Just wanted to know if this could cause a problem later on with moisture? Thanks
Really good question!
DirecTV "approves" a compression fitting that uses a different principle. The compression fitting grips into the side of the cable and makes a very strong and waterproof seal without the need for an "O" ring or gel. I don't like them because they are about $.25 each.
The "F" connector with gel & "O" ring is my favorite....because they work well and are about $.09 each. I have used thousands of these over many years and have not discovered failures.
As it is with many mechanical things, it is the correct application of the materials that makes the difference. The main reason for failure of the compression fitting is the failure to compress the fitting with the correct tool. The other failure is incorrect splicing of the cable so some wire scrap shorts the end of the cable.
The main reason for the failure of the "F" fitting is the variable diameter of cable made by different manufacturers. If the cable is too thin the tool will not crimp the fitting correctly. Likewise "F" fittings that are too big will not correctly slide into the cable end or crimp correctly. These also need to be spliced correctly and crimped to avoid a defect.
I might add that you really do need good light to cut fittings to avoid wire scrap in the fitting. They continue to schedule work after dark and it gets done correctly most of the time.
I have never seen a comparison between a correctly compressed compression fitting and a correctly cut "F" fitting with "O" ring & gel. I think the difference is that a new tech will have a better chance getting the compression fitting to work correctly with little training.
There is a debate about the use of the gel to waterproof and lubricate the fitting threads. Also the use of various kinds of boots to keep water out continue to be accepted and rejected.
Part of a correct fitting use must be a drip loop / service loop to keep water from flowing into the fitting. I like using an enclosure or "drop box" like the phone companies but...cost considerations dumped these.
Good question!
Joe