Water Supply Regulations Backflow Prevention

An air gap is a vertical physical separation between the end of a water supply outlet and the flood level rim of a receiving vessel.

Water supply regulations backflow prevention.

Cross connection backflow prevention. Backflow is a term in plumbing for an unwanted flow of water in the reverse direction. Testing must be completed by a certified tester with a valid backflow prevention device tester certificate see below. District s responsibilities pursuant to the safe drinking water act the colorado department of public health and article 11 39 of the colorado primary drinking water regulations it is the regulatory responsibility of the.

This manual is a revision of an earlier book entitled water supply and plumbing cross connections phs publication number 957 which was produced under the. Backflow prevention backflow is a term in plumbing for an unwanted flow of water in the reverse direction. What is an air gap. Indirectly in water supply distribution systems.

The following is designed to give an overview of the changes made from the water supply byelaws guide to the water supply regulations 1999 water regulations. Backflow can be a serious health risk if the mains water supply is comes into contact with foul stagnant or contaminated water. On the 1st july 1999 the water supply water fittings regulations 1999 were introduced. This separation must be at least twice the diameter of the water supply outlet and never less than one inch.

An important consideration of the regulations is backflow prevention. New jersey regulations require a physical connection permit be obtained by the owner of a facility containing an unapproved water supply and a public community water supply permits are not required for private residences. It can be a serious health risk for the contamination of potable water supplies with foul water in the most obvious case a toilet flush cistern and its water supply must be isolated from the toilet bowl. It is intended to be used for educa tional administrative and technical reference in conduct ing cross connection control programs.

State regulations require residential commercial and industrial customers served by a public water system to protect the public water system from potential contamination. A cross connection is a physical connection through which a supply of potable water could be contaminated or polluted. A secondary type of mechanical backflow preventer is the residential dual check valve.