Air Admittance Valve Internal - 110mm Black
|Guarantee||1 Year Manufacturer Performance Guarantee|
|Specification||BS EN 12380:2002|
Air admittance valves are an ingeniously designed fitting that avoids the need for a soil vent pipe to terminate externally and within the strict traditional guidelines that govern position.
Traditionally, open vent pipes needed to be installed at least 900mm above any opening into the building that is within 3 metres of the vent pipe. This was to prevent foul odours from entering the living space. The beauty of air admittance valves is that they allow air to be drawn into the pipework to prevent pressure build up, but crucially no foul odours can escape from the system.
This means that an air admittance valve can now be situated anywhere in the above ground drainage system provided it is at least 200mm above the highest wet entry point of the soil vent pipe (the wet entry point is the highest point of the soil pipe system that waste water can flow into).
There are two types of air admittance valves – internal and external. Both should always be fitted in an upright position. External air valves incorporate a push fit rubber seal connection into the soil pipe. Internal air valves are a simple push fit around the outside of the soil pipe. Both types can also be used as a secondary rodding point.
Also often referred to as Durgo Valves, air admittance valves enable installers to save on both labour and material costs. They are also far safer than open vent pipes from a maintenance perspective as they remove the need to gain access above roof level.
Ring Seal Soil Systems
Ring Seal Soil and vent is the most commonly used soil system in domestic and non-industrial commercial properties in the UK.
Our FloPlast ring seal soil system is compatible with most other soil systems that are manufactured to British/European standard.
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.
Orders placed by 12.00 noon will be delivered the next working day. Orders placed at weekends will be delivered on the following Tuesday. Read our delivery details for further information.
Our Returns Policy
You can return any items for a full refund (excluding any carriage charges) within 28 days of your purchase - the only exception being specially manufactured items such as fabricated gutter angles or profiles which cannot be returned. All returned items must be unused and in saleable condition. You should include a copy of your original purchase invoice with any goods that you return.
Please note that you are responsible for the cost of returning unwanted items. If you are unsure of how to go about arranging a carrier please let us know so that and we can assist you with this, although you should be aware that we cannot be held responsible for any carrier losses or damages prior to the goods being checked in at our warehouse.
Please click here to download a Goods Returns Form which you should enclose with any returned items. Our full postal address for returns is detailed on the Goods Returns Form.
Once the goods have been checked back into our warehouse we will arrange for the credit/debit card that you used for your original purchase to be refunded. Please allow fourteen days for the refund to be processed. Any items that have been ordered specially are excluded from this guarantee, as are any goods that are delivered ex-works such as sewage treatment plants or rainwater harvesting systems.
Read our returns policy for further details.
Our Returns Policy For Cast Iron Products From Hargreaves Foundry Products
If you wish to return any of our Cast Iron products, then please contact us as soon as possible. We can then liaise with the manufacturer and issue a returns form which will need to be returned to Hargreaves alongside the products. Our cast iron products come direct from Hargreaves Foundry (HF) in Halifax so returns will need to go directly back to them.
All return requests must be notified within 90 days of the goods being dispatched from HF and all damaged items must be notified within 24 hours of receipt of goods. All items must be returned in a saleable condition. Once agreed, the goods must be returned within 14 days from the date stated on the Return Form.
Please note that any bespoke items or specially painted RAL coloured items or Mech 416 Soil System pipes are non-returnable. Please be aware that all returns for Cast Iron Gutters and Soil & Drainage will incur a re-stocking charge of between 25% & 30% for exact details please view our Hargreaves returns policy.
The % charged is based on the net selling price of the original goods - this charge is unfortunately out of our control as it is levied on us by the manufacturer.
For full terms and conditions related to cast iron returns please consult our Hargreaves returns policy.