In StockAnti-Syphon Valves
£3.96£4.40Save £0.44
In stock
Available from our Bristol shop
This item is too big for our parcel service, so we don't sell it for delivery on the website. Buy it in the shop, or contact us for a delivery quote.
In stock now: ·
- Free UK mainland delivery over £99, otherwise £4.95
- Order by 2pm Monday to Friday for same-day dispatch
- 30-day money-back guarantee · Delivery & returns
or buy it now with
Key facts
| Type | Anti-syphon valve for irrigation lines |
|---|---|
| Sizes | 16 mm low pressure, 25 mm low pressure, 16 mm high pressure (TNL) |
| Brand | Greens Horticulture |
| Category | Fittings |
How to use
Fit the valve in the supply line to match the pipe size and the pressure of your system: a low-pressure valve for a low-pressure system, the high-pressure (TNL) valve for a high-pressure line. Follow the instructions supplied for which way round it goes.
For other pipe joints see our fittings and supply pipe.
Questions
Which anti-syphon valve do I need?
Match the pipe size (16 mm or 25 mm) and the pressure of your system. There are two low-pressure sizes and one 16 mm high-pressure version.
What does an anti-syphon valve do?
It stops water being drawn back or siphoning through the line when the flow stops, so a tank or pipe run does not drain itself.




