Buy Soil Pipe Systems & Fittings Online Cheap

We keep in stock both Push Fit as well as Solvent ranges in black and grey. All items are sourced from a UK manufacturer and they’re all tested and approved for use as shown by their British Kitemark. We’ve selected these products due to their excellent mix of high quality and low prices.

Additional Information on Soil Pipe:

picture of vent stack installed on the side of a house

The vent stack is the soil run that would usually connect to your pan connector that attaches to your toilet or other services and would typically run externally down close to the side of the house or property and connect into the underground sewer system.

Soil pipes will also have boss connections for attaching smaller size fittings to dispose of water from the bath, sink, appliances and services of a property. The stack would then run upwards to just above roof gutter level where an air admittance valve will be installed to allow airflow to stop a vacuum and allow the water to flow correctly. They are most commonly black in colour, but they do also come in grey or white colour. However there is a range of decorative colours which we can bring in, so if you're after a specific specialist colour then let us know.

How do these products work?

picture of a vent stack being connected to a drain

As mentioned above the soil vent system is installed to transport water, services and sewage from upper floor toilets, baths and sinks and appliances into the underground system. However, the vents allow smells and odours from the plumbing and sewer system to be released into the atmosphere.

Placing the outlet at roof level means the odours are dispersed of somewhere where it won’t be smelt.

What size products do I need?

Picture of a 110mm push fit triple socket t 90 degree junction branch in black

Soil products generally come in sizes and diameter from 3 inch to 6 inch in diameter dependant on range required, these are 75mm, 110mm and 160mm in metric, and are supplied in 3m or 4m lengths with the best seller being the x3m length 110mm diameter. The size you need will depend upon the outlets and inlets you need to connect to, and the amount of water that will be transported through it.

A standard home will usually use a 110mm diameter (or 4 inch) soil vent stack, which would connect into a standard pan connector, and into a standard 110mm diameter underground sewer system.

How Do We Join them Together? Do they need to be glued?

pipe lubricant for underground sewer pipe drainageblack swan pvc solvent cement

The two most common ways of joining these lengths together are push fit joints (double or single socket), which are joined together by pushing the joints together where a lubricated rubber seal prevents leakage. Or by solvent weld, where a solvent glue will be used to glue the joints together creating a permanent seal.

We keep in stock both push fit soil and solvent soil ranges in 110mm, in black and grey.

Building Regulations: Drainage and Water Disposal - Is there anything I need to be aware of?

Approved document H: Requires that the foot of a vent stack should have as large a radius as possible, rather than less than 200mm at the centre line. Offsets must be avoided in the wet section of the stack.

The runs should complete at least 900mm over any opening within 3m and should be completed with a wire cage or other perforated cover. The lengths must keep sufficient downward slope in their length to keep liquids and solids flowing freely towards the drain. Air must be allowed into the system either via a vent cowl or an air admittance valve.

Can I Connect PVC Waste to a Cast Iron Stack?

picture of a cast iron vent stack

This is a question we're commonly asked here at EasyMerchant. Lots of our customers want to replace their old cast iron system and add a new PVC system. Normally the installer would have to dig up the existing concrete to replace the drain connection.

Luckily, specialist soil pipe fittings are available allowing the installer to cut the lengths, fit the adaptor and replace the rest of the system with uPVC. Please contact us so we can source this fitting for you if needed, as well as others such as air admittance valves.