Firstly, get to understand the function of a check valve in the sump pump. Does the sump pump need the check valve? The answer is a definite ‘Yes.’ The reasons are not hard to find, technically speaking. Come ample rain or steady snowfall and the sump pump protects against the basement flooding. If the sump pump breaks down, it is often due to the malfunctioning check valve.
You need to install the check valve in the discharge pipe of the sump pump. What happens when the sump pump is switched off? According to the laws of gravity, the water still in the discharge pipe falls back into the sump pit. The function of the check valve is to prevent the water from returning into the sump pit. In other words, the damage is restricted to the sump pump from the returning water. The check valve ensures a better and longer life for the sump pump.
Reviews of 4 quality contemporary check valves
Consider the relevant information concerning the available check valves available. Comparisons of materials, quality, performance, and prices would facilitate a safe choice.
WAYNE 1-1/2 in.
This check valve works with almost any sump pump. Connections of different sizes may require adapters. The threaded male end measures 1-1/2 inch, and the shoulder end is 1-1/4 inch. Installed easily, the material is PVC. The pump water opens and closes the valves. Noise is significantly reduced while the sump pump works by using this check valve. Water back flow is controlled very well. The threaded joints result in easy setup. Take care not to tighten too much.
If you install this check valve on a 1-1/2 inch pipe, it is excellent service. While slip x slip unions are used and tightening is achieved through clamps, cement or glue may be used while installing. The curving flapper over the radius results in water flowing nicely in the right direction. It may be mounted horizontally or vertically according to the pump pattern. No problem with water noise either. Plastic materials prevent corrosion.
Metal clamps need tightening occasionally. Without glue, slip x slip unions would leak — neoprene seal results in dry rot after continued use.
Noise and water hammer are effectively curtailed with this silent working check valve. Instead of the system that works on gravity, this check valve has an internal spring-loaded flapper mechanism. The valve is manufactured from translucent plastic material, and the working is visible. Things going wrong are easily detected. Easy installation with screwed on couplings. According to the sump pump design, install horizontally or vertically. Plastic construction will not last so long. Spring-loaded flapper could slow the water flow rate.
This product of Zoeller is manufactured from cast iron, and epoxy powder coating prevents corrosion. A 2-inch flow design encourages faster water flow. The flapper hinge is very wide that reduces stress, and the flapper lasts long. Stainless steel clamps and screws are handy, and tightening is not necessary. Easy to install, PVC piping or copper or steel will do for horizontal or vertical installation. Flexible neoprene unions are used.
This check valve makes more noise in comparison. Neoprene unions could result in dry rot. Damaged finishing may result in rust/corrosion.