Posts Tagged ‘faucet’

Anti-Siphon Spigots | DIY Plumbing

Thursday, April 17th, 2008

Plumbing repairs can all often be frequent, especially if you live in a colder climate then then you will find, as a home owner, that an anti-siphon spigot will help you out a great deal. just buy spending a couple of exrtra dollars you’ll be able to ultimately save yourself some money because you shouldn’t need to replace spigots you have outdoors when it’s cold.

Anti-siphon spigots the homeowner are heroes for those who live in climates colder winter. For one or two dollars, you can avoid having to replace a faucet outside because of the low temperatures. Here’s why …

In areas where winter temperatures get below 20F/-7C, it is possible for water trapped in the faucet and sillcock freeze and develop. The figure is approximate. It is certainly possible that the same water to freeze at 32F/0C, but the warmth of the house to help reduce the “danger zone” temperature somewhat.

Now that the ice has two potential problems similar to those that cause pipes under the house to burst occasionally in the winter.

The ice takes more room than the water did. You can test that by filling a cup exactly to the rim with water and then put it in the freezer. You will notice that the ice sticks slightly above the rim. Extra volume is not a problem when the page is opened. But when the water / ice has nothing to grow, it raises the pressure on the container. Raise it enough and you can break a seal.

The main effect, however, is because the pressure is beyond the block of ice. The air and water had nowhere to go. The air is compressible, but all the water will create high pressure trapped on the internal parts of the valve and sillcock. Even heavy metals, made more fragile by the cold anyway, can be divided. Plastic and rubber are cold-hardened convicts.

When the weather gets warmer and it is still responsible, you now have a faucet with a crack. If he does not spontaneously leak, turning on it will ensure a drip or worse.  This is something you need to understand about plumbing repairs.

An anti-siphon valve contains an additional mechanism beyond the ordinary water faucet outside. Hoses attached as normal, but the inside and outside, they have features to prevent the outbreak from the tap because of the ice and blocking the expansion.

A few things help prevent anti-siphon valve as a mere cracking.

The seal / valve closes fact that the water flow is also back in the sillcock - inside the house, which is warmer. This avoids reaching cold temperatures of the water. More useful still is the ability of the sillcock to withdraw water away from areas where the accumulation of ice can be a problem. It retains water to stay near seals that can be frozen and cracked by low temperatures.

But most importantly, the design of the sillcock / valve helps alleviate the pressure so that all the ice does form. It provides a venue for expansion of the water to go when pressure builds up in other parts of sillcock / spigot.

Despite that, in warm conditions and with normal use, it is possible for antisyphon spigots to flee the pressure-relieving top beak or elsewhere. Kits with the replacement of joints and other internal parts are available for a few dollars. For those who prefer to repair rather than replace, or if the other end of sillcock is difficult to access, these kits can save money and time.  Hopefully this information will be useful to those interested in plumbing repairs.