This Soil Stack set contains the basic poducts to build or replace a soil stack, namely;3 x 3m 110mm Soil Pipe with Ring Seal Single Socket2 x Additional Push Fit Couplings3 x Pipe Clips1 x 87.5 Degree Junction1 x Vent Terminal 1 x 250ml Solvent WeldAdditional components can be added as required. If you plan to terminate the Soil Stack within the roofspace you should use an Internal Air Valve AV110. If the soil pipe penetrates through the roof covering we recommned using the SP320 Weathering Slate to ensure a watertight seal.Ring Seal Soil Systems_x000D_Ring Seal Soil and vent is the most commonly used soil system in domestic and non-industrial commercial properties in the UK. _x000D_Our FloPlast ring seal soil system is compatible with most other soil systems that are manufactured to British/European standard. _x000D_To install any pipe or fitting into another ring seal fitting, first make sure the end of the pipe has been chamfered. Clean off any dirt or debris and lubricate the joint with silicon lubricant. Push the pipe in squarely until resistance is felt, then withdraw it very slightly to allow for any potential system expansion.