open impeller slurry pump through insurance

Weep hole

rwh

I am curious on other members thoughts on the weep hole that is recommended on sump pump discharge piping. Necessary, not necessary? How high do you like to put it? Can it be placed below the waterline?

rwh

I am curious on other members thoughts on the weep hole that is recommended on sump pump discharge piping. Necessary, not necessary? How high do you like to put it? Can it be placed below the waterline?

Plumbus

Some of the manufacturers say it is. Customers consider it a pita. But, don't put it in and there goes the warranty. A tip I got many years ago was to drill the hole on a angle upward so that the discharge would go downward and not splash so much.

The Dane

Drilling the hole on an angle is actually in the installation guide.

Debo22

He said it because nobody reads the installation guide

plungerboy

I believe liberty pumps have that built into the pump.

paultheplumber1

I believe you are correct

PLUMBER_BILL

Here is another reason on how to place the weep hole. We had a sewer pump [not a grinder] always would block up. Reason grand-children using too much paper lucky the pump had a piggy back switch. We got tired of pulling the pump a cleaning the float{s} off. Aimed the weep hole at the floats ... Automatic float cleaner Don't forget the previous topic about extra hose clamps with a piece wire clamped so a check cannot blow apart.

SHEPLMBR70

If you drill it in the right spot, it helps clean off the float many times.

Michaelcookplum

I was taught to drill hole 1" above pump. I've only installed zoeller

dhal22

Zoeller only for me as well.

Buddy

I called zoeller a few years ago and was told the reason for the quarter inch hole even with the top of the m53 pump was because the pump could lose its prime or something to that effect.I actually went to a home where the pump was running but not discharging any water so i pulled pump,drilled the hole and it works fine now.You can get good info from calling Tech support and they are eager to help

RichardBull

The weep hole helps prevent pump cavitation.

Plumbus

Pump cavitation is the phenomenon that in a moving liquid the local pressure becomes lower than the vapor pressure of the liquid. Where otherwise a liquid only vaporizes at 100 °C, this now occurs at a lower pressure, at a lower temperature.

Liquids in impellers can flow at high speeds. According to Bernoulli’s Law, a pressure reduction occurs where the velocity increases. This will create vapor bubbles that can forcefully implode when they enter an area where the pressure is higher. The implosion generates a shock wave that can be heard as a sound, which can cause serious damage to the impeller and pump. The sound of a cavitating pump is very similar to pumping a liquid with pebbles and is far from pleasant. The local fluid accelerations, determined by the shape of the obstacles like impeller and diffuser vanes, play an important role in controlling cavitation. At higher temperatures the chance of cavitation increases due to the higher vapor pressure. At higher pressures the chance decreases because the margin with the vapor pressure increases.