- A ring seal soil system utilises push-fit joints with rubber ring seals to create watertight connections. Pipe lengths in this style come with one socketed end and one plain end as standard. The socketed end houses the rubber ring seal, and the plain end is chamfered to allow it to slide into the socket end of another pipe or fitting without dislodging the seal. With the liberal application of some silicone lubricant around the chamfered end and ring seal, the connection is simply made by firmly pushing one into the other...hence it being called a "push-fit" joint. This is a forgiving style of jointing that can be pulled apart and reconnected as many times as needed when installing a soil system, making replacing damaged or worn out sections relatively quick and easy. - The installation of PP and PVC sewer pipes with flared joints with a PVC gasket is done by pushing the spigot end of the pipe or fitting into the socket of the previous element. For facilitating the connection the spigot end should be applied with a thin layer of a lubricant to ease the pipe into the socket. - Remember also that the best installation temperature is between 10 C - 20 C, and when the temperatures are lower, the gasket should be soaked for a while in hot water because gaskets harden in lower temperatures. Internal PP and PVC sewage system pipes should not be installed in temperatures below 0 C. - Plastic has limited durability to increased temperature and UV radiation, and thus they should be protected against: extended exposition to sun, excessive heating from heat sources. Note: soil pipe systems are suitable for short intermittent discharges of hot and cold water in normal domestic installations in the UK. They are not suitable for continuous discharge at elevated temperatures.