What are plastic pipe cements and how do they work?
A plastic pipe cement or solvent cement is a mixture of plastic resin dissolved in solvents. The cement works by solvent action to dissolve the plastic surfaces of the pipe and fitting and fuses them together to create a joint.
How strong is a solvent-cemented plastic pipe joint?
Plastic pipe cements are designed to make a plastic pipe joint that is as strong or stronger than the pipe itself.
What are the main installation problems to avoid?
- Loose-Fitting Joints
1/3 to 2/3 dry fit is recommended. Dry fit is the fraction that the pipe can be pushed into dry fitting without cement.
- Improper Cement Selection
Follow guidelines on can or data sheet for proper pipe type, schedule, diameter, application and working conditions. Do not mix plastic types.
- Pipe Burrs
After cutting the pipe square, remove any burrs to avoid a leak.
- Insufficient Cleaning
For best results, use ARROW Primer, 911, for pressure applications, and ARROW Cleaner, 901, for non-pressure.
- Not Enough Cement Used
After cementing, a properly made joint will show a bead of cement completely around the pipe/fitting interface. Wipe off the bead for faster curing.
Is there a way I can tell if I have made a good joint ?
Check the above main installation problems prior to cementing. During installation, you can get an indication of a good joint if the pipe “grabs” (i.e. fuses) the fitting a few seconds after joining and becomes a firm union. If the pipe is wobbly in the fitting after the joint has been assembled, it indicates a loose-fitting joint and should not be used. The use of a primer prior to cementing overcomes some installation problems and will make a stronger joint. After the joint properly cures (24 hours recommended), you can pressure test the joint.