Does a washing machine need a P-trap on the drain line? | | Always | 76% | | In most cases | 4% | | In some cases | 10% | | Never | 4% | | Not sure | 4% | | | | | Question: Does a washing machine need a P-trap on the drain line? Top Answer (76% of 47 votes): Always.
Answer: Always
Explanation: yes to prevent sewer gas coming in the home | | T and T Repair Services | Answer: Always
Explanation: Prevents sewer gases from entering your home by creating a water seal in the drain line.
Traps debris to help prevent clogs from reaching the main drain line.
Required by plumbing code in virtually all jurisdictions.
Code Requirements:
The P-trap must be properly vented (typically with an air admittance valve or a vent stack) to allow for proper drainage and prevent siphoning.
It must be located above the floor (not underground) and typically within 30 inches of the standpipe or washer connection.
The standpipe (vertical section of pipe where the washer drains) is also required and usually must be 18 to 30 inches tall.
Common Setup
Washing machine drains into a standpipe.
The standpipe connects to a P-trap.
The P-trap connects to the main drain line and has a vent.
If you're installing or inspecting a washer setup and there's no P-trap visible, it's either a code violation or hidden inappropriately both of which should be corrected. | | Prime Plumbing | Answer: Always
Explanation: Cofe | | Gpc | | | ProMatcher | Answer: Always
Explanation: This is California code | | AIRIGHT | Answer: Always
Explanation: Any plumbing fixture with a drain needs a P-trap installed to prevent sewer gasses from entering the home. | | SDL Plumbing Inc. | Answer: Always
Explanation: The P-trap keeps sewer gasses from exiting the drain line. | | EVERYDAYPLUMBER.com | | | ProMatcher | Answer: Always
Explanation: P-trap is needed so the sewer gases do not enter the home. | | Massimo Plumbing Services | Answer: Always
Explanation: Yes every plumbing fixture requires a trap before it connects to the building drainage system to keep harmful gas from escaping into the room. | | Plumbing Professionals | Answer: Always
Explanation: The trap prevents sewer gases from escaping the pipe and causing a dangerous situation. | | Extreme Extraction and Decontamination llc | | | ProMatcher | Answer: Always
Explanation: to prevent stagnant water (sewer gas) from backing up | | La Rose Home Repair | Answer: In some cases
Explanation: If draining into sewer or septic systems | | John's Appliance Installations | Answer: In some cases
Explanation: Direct drain line to main | | Lobocos Handyman Service |
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