backflow valve

backflow valve

[′bak‚flō ‚valv]
(engineering)

backwater valve, backflow valve

A type of check valve in a drainage pipe; reversal of flow causes the valve to close, thereby cutting off flow.
References in periodicals archive ?
The project consists of two main objectives: the addition of an 8 RPDA backflow valve on the fire system on the east side of the existing vault (Scope 1) and the addition of a 4 RP backflow valve at the domestic water supply service meter (Scope 2).
To prevent sewage backup, have a licensed plumber install an interior or exterior backflow valve.
The Department of Public Works and Parks is extending its Backflow Valve Rebate Program to include commercial and industrial properties.
This doesn't include the costly and controversial backflow valve requirements that are costing businesses and homeowners millions of dollars.
The firm added a specially designed screw with a precise backflow valve, a special barrel and its accurate temperature control module to ensure the exact heating of the mold to its electric machine and created the EC-LSM.
Allocation unit VE 28 instalation of ventilation systems16 Diagonal Fans 1,700 mA / h, 16 pipe silencer,16 Automatic backflow valve, 16 annulus seals DN 315,Antimicrobial pipe DN 315 60 m, 16 m DN 500, 5 surface temperature sensor, 20 outdoor humidity and temperature sensor.
The city offered to pay part of the cost for a backflow valve for homes affected in 2005.
Install a backflow valve in the floor drain if you live in an area where sewers sometimes back up into homes.
District plumbers installed separate pipes and backflow valves on the irrigation lines to prevent contamination of the stadium's drinking water "without regard to whom might be responsible for the individual items in order to protect human health," Lauch wrote Beban in July.
First, odd addresses should be given a separate day of the week to water than even and a looped pressure relief gravity (stack) fed reservoir system with isolation and backflow valves should be installed on trunk lines until they can be replaced.
Examples of mitigation measures include grading or contouring of land, relocating or elevating utilities or mechanical equipment, building retaining walls or seawalls, installing sewer backflow valves, constructing levees, or dikes, installing hurricane shutters or impact resistant window and door systems.
Encouraging residents to buy backflow valves to deal with flash flooding and pushing the use of "blue rain water barrels," which help flood control, lower sewer bills and provide free water for yards.