BCNA was incorporated in 1982 in the State of Colorado for scientific and educational purposes. BCNA is a non-profit, tax-exempt, corporation under section 501(c) (3) of the Internal Revenue Service Code. Click this link for a brief history of BCNA, listing initial and continuing projects and a number of publications.
The spring is typically located around a central shaft that is attached to the closing disk. The entire assembly is securely enclosed in a machined brass housing that contains the workings of the check valve. The check valve is generally located above the submersible pump unit by a few inches. This ensures that the long column of water remains in the well pipe. This increases the efficiency of the pump by not having to refill the length of the pipe every time the system calls for water.
Finding your private shut-off valve: The location of the shut-off valve varies, but all buildings less than 25 years old have one. Likely locations for the private water shut-off valve include : Close to an outside hose bib, where the water supply pipe enters your home. The valve will be located inside a box or pipe in the ground, several feet from the exterior of your home.