of our environment

The anti siphon valve
safe and reliable


High-quality mechanical anti siphon valves for:

For the storage of diesel above ground, such as in an IBC cylindrical storage tank, an anti siphon valve is required. This is to prevent the occurrence of environmental calamities due to uncontrolled liquid streams. The anti siphon valve must be KIWA certified according to BRL-K916.

AdBlue is a high quality urea dissolution used to decrease the emission of nitrogen oxides of diesel engines. Legislation is in process for the above ground storage of AdBlue in order to prevent environmental calamities. The PVC anti siphon valve ensures this safety.

Chemical liquids such as acids and lixiviums which are stored above ground must be secured with an anti siphon valve, according to PGS 31. This is to prevent environmental calamities. The anti siphon valve must be KIWA certified according to BRL-K916.

Advantages of mechanical anti siphon valves compared to electronically controlled anti siphon valves are:

No malfunctions

Cheaper in price

Faster installation


The BRASS anti siphon valve for DIESEL

  • Thé anti siphon valve can be delivered with the following connections:
    3/8” 1/2” 3/4” 1” 1½” 2”
  • Counter-pressure in MwK (Meter of water column):
    1,1 1,3 1,6 2,0 2,5 3,0

Safe and reliable

The PVC anti siphon valve for AdBLUE en CHEMICALS

  • Connections:
    32mm 40mm 50mm 63mm
  • Counter-pressure in MwK (Meter of water column):
    1,1 1,5 1,9 2,6 3,3 4,2

Safe and reliable

The general terms and conditions of Metaalunie will be applied for all offers and deliveries.

Download terms and conditions metaalunie-p-lid-logo


The anti siphon security has been designed to prevent any environmental calamities from happening. Ground and water can be polluted by an uncontrolled liquid outflow from the storage tank.

According to law, every IBC or cylindrical storage tank with a pump requires an anti siphon valve. The anti siphon valve must be KIWA certified according to BRL-K916. A carefully chosen and well installed anti siphon valve (liquid density * height of the tank) with a fluid pressure relief valve prevents this siphoning and will keep the environment clean.

Overdijk Techniek delivers these KIWA certified anti siphon valves, which are developed and produced in our company. Our model and design are registered.

The anti siphon valve of Overdijk Techniek represents safety and reliability.

About us

Overdijk Techniek is a producing firm with more than 30 years of experience in the technical sector. We are specialist in anti siphon valves, because we focus on anti siphon protection. All our products are certified by KIWA and are safe and reliable.

We work according to the principle that you as customer are king. Our K.I.S.S. philosophy (Keep It Stupid Simple) proves this point. In every situation we want to help you with pleasure and if there is a problem we will solve it. Old-fashioned service, because you, our customer, deserves it!


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