Why perform you need to understand what a trap primer is…or for that matter, what a catch is? since homes, plumbing systems, electric systems, and also even the ground have the right to do monster things. Such as emitting a rotten odor girlfriend can’t ignore.

When that happens, it’s quite possibly due to sewer gas coming right into your house from your floor drain. To save that gas out, your drainpipe requires a trap, and also that trap needs a catch primer.

What go A plumbing Trap look Like?

Let’s discuss the catch first. A pipes trap looks like a U-shaped pipe. This U-shaped pipe likewise looks prefer the letter p on the side. That’s why plumbers contact it a p Trap. It deserve to be made out of metal or PVC (a artificial plastic polymer which has a white-plastic look). Take a look under her kitchen sink or restroom sink to view one for yourself.

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As you can see, a p trap is simple. It’s simply a U- or party P-shaped pipe that keeps water flowing out while keeping sewer gas from floating in. And yes, over there are other shapes that attain the same thing.

How walk a pipes Trap Work?

All plumbing fixtures in a home have actually floor drains. The floor drains enable water to circulation from your house and into a city’s sewage system or storm drains. This keeps your floors dry and safe from water damage.

In turn, each pipes fixture — native kitchen sinks to bathrooms to showers come water heaters and more — is forced to have a plumbing trap. The traps stop smelly drain gases from comes up indigenous the floor drain and also into your home. However, in order for these pipes traps to occupational — by “trapping out the sewer gas emissions” — water requirements to drainpipe into castle to develop a liquid seal.

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Put an additional way, here’s what’s happening. Water is trapped at the bottom the the U-shaped ns Trap. This trapped water creates a seal in your pipe, i beg your pardon prevents any kind of sewer gas from coming up through the drain and also into your home. Sewer gas can’t acquire past the seal of water in ~ the bottom of the U-shaped trap. It’s a simple but brilliant solution.


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In this diagram, you have the right to see how water in the plumbing trap avoids sewer gases from acquiring through (back right into the home) by developing a liquid or water seal.

What Is A catch Primer and also Why carry out We need It?

Just favor the trap, a trap primer is relatively simple come understand. It’s a device that to add water to your plumbing trap. That’s it. And here’s why you require it.

If fluid doesn’t go down your drainpipe often enough, the fluid seal – the water in ~ the bottom that the U-shaped catch — will at some point evaporate. Through the seal gone, sewage system gas is now able to obtain through the drainpipe pipe and into her home. That’s a severe problem, and can result in a plumbing emergency (or even a health emergency; scroll under for an ext on that).

A trap primer (or catch primer valve) is a good idea for every one of your pipes fixtures. But don’t hesitate installation them on any type of plumbing fixtures that aren’t being supplied regularly. This can be an extra bathroom sink, shower and also toilet; or maybe in a vacation house you only visit as soon as or double a year.


Watch this video for a quick explanation of a trap and trap primer. The primer in this photo is to the left. The catch is on the right.

Different types of catch Primers

Most straightforward method. Used most often with a floor drain trap is a quick link from a sink that’s carefully located. As soon as the sink is used, some of the water goes come the trap. Most common method. The primer connects to a safe and clean water supply. When pressure per square customs (PSI) is sensed — such together from a adjacent toilet or sink — that adds few of that water circulation to the trap.Other methods. part trap primers job-related on timers (based ~ above your setups for when a home is unoccupied). While others create plumbing devices (like a wash faucet) has actually has a integrated trap primer. And also there are other types as well.

Is drain Gas Harmful?

Sewer gas is not typically harmful in smaller sized doses. But sewer gas have the right to be harmful over time, v prolonged, more heavier doses, if the difficulty isn’t resolved. The main gas in sewage system gas is hydrogen sulfide. Research studies have displayed that big amounts are toxic come our oxygen systems, with the potential to damage organs and, in rarer circumstances, even reason death.

If you an alert that there is an uncomfortable odor coming from areas of your home where there are floor drains, you might want to inspect to make sure you don’t have actually a dried trap and also do have a functioning catch primer.

Call 1-Tom-Plumber

Our experienced plumbers can assist you determine or download a trap primer. We deserve to even display you wherein you have floor drains and plumbing fixture trap througout her home.

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Don’t hesitate tocontactor speak to us at1-Tom-Plumber(1-866-758-6237). Us will automatically handle anyemergency plumbing,drain cleaning and also drain clearing, andwater damageproblem, includingexcavationof secret water lines and also sewer main lines.