| What is a CHECK VALVE? Sewage can flood into homes if a sewer system becomes plugged plugged exceeds capacity or in the case of groundwater flooding. While valves valves to prevent sewer backflow are available, many municipalities do not not mandate the installation of the valves or, due to cost constraints, it was was often difficult to enforce codes. A sewage backup can occur when there is a blockage in the municipal municipal sewer line, or when the amount of sewage and infiltrated storm water water exceeds the sewer's design capacity, resulting in a very high flow flow condition Help prevent basement flooding, expensive property damage messy cleanup with a clean check valve. Properly installed, by a Certified Licensed Plumber the clean check valve. operates like a check valve, sealing off water backup from overloaded sewers. As water backs up, the float automatically opens and pushes the water out into your main sewer line. A Clean Check extendable backwater valve consists of a tee-shaped valve body, top collar with stainless steel thumb screw and bottom collar with a replaceable PVC flapper attached. The 3-inch and 4-inch valve bodies and collars are offered in either ABS or PVC while the 6” is available in PVC only. A 6” or 8” riser pipe is provided by the contractor and field cut to the required length to extended from the sewer lateral to ground level. A 4” internal riser is then assembled at the jobsite by cutting a 4” pipe that is 3-1/2” shorter than the 6” or 8” external riser was cut. The flapper assembly is glued to one end of the 4” pipe and the riser guide on the other. The entire 4” assembly is then inserted into the 6” or 8” riser. Mated slots in the flapper assembly and body fit snugly together when inserted to prevent incorrect installation. A set-screw in the 4” riser guide is then tightened against the external riser pipe to keep the assembly firmly seated. Clean Check extendable backwater valves may be installed up to 12’ deep and still still comply with ICC and IAPMO standards without installing a costly manhole. For For maintenance, the 4” internal assembly can be slipped out of the external riser at at ground level so the flapper can be examined or replaced. The flapper comes up to to you instead of you going down to the flapper. It is inexpensive, easy to install and and maintenance takes minutes. It’s everything a backwater valve should be. |
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