Thermal expansion - The coefficient of linear expansion for ABS is 10.1
Approvals - All our ABS pipe and fittings are WRAS approved for use in drinking water systems
Compatibility of ABS with PVC pipe systems
We are often asked if ABS and PVC systems can be mixed together. Although technically, from a chemical compatibility standpoint, the two should not be combined, from a physical standpoint they can be connected to each other, albeit with reduced mechanical strength. If using ABS glue, the fittings can be cemented to PVC pipe and the join will feel strong. Whilst such a joint will in most cases provide a water tight joint, it should be born in mind that there are no recommendations or guarantees for the strength of the bond. If operating at low pressures (for example less than 2-3 bar) this is unlikely to present an issue, but there will be increased risk of the joint becoming compromised at higher pressures. This can be offset a little is additional pipe clips and fixings are put in place, by preventing movement of the pipe.
ABS is a more expensive material to use in systems than PVC. The latter tends to be the pipe material of choice for most systems, with ABS selected only when environmental conditions dictate that PVC is not suitable.