Is This A Backflow Valve? - Plumbing - DIY Home Improvement | DIYChatroom


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 01-20-2013, 12:08 PM   #1
Newbie
 
Join Date: Jan 2013
Posts: 4
Rewards Points: 10
Default

Is this a backflow valve?


It is fairly rusted and could be linked to my sump pump, which never runs, and that would explain all the rust...I probably should change it to prevent sewer gas from coming in basement?

Advertisement

morronatico is offline   Reply With Quote
Old 01-20-2013, 12:11 PM   #2
Newbie
 
Join Date: Jan 2013
Posts: 4
Rewards Points: 10
Default

Is this a backflow valve?




Advertisement

morronatico is offline   Reply With Quote
Old 01-20-2013, 12:16 PM   #3
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,762
Rewards Points: 2,024
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Is this a backflow valve?


Backwater valve.


That's because your lowest floor is below the level of the nearest manhole. If the city were to back up, it would end up in your house instead of the street without that valve.

If the check moves freely and the mating surface of the check and the valve body look smooth, I wouldn't worry about changing it. The ones we put in are plastic, so i'm not sure if you'd have access to the exact same model that you have there. If you were to get a different model, it may change the dimension, and cause you to have to get the jackhammer out.

Which direction is the slope of the pipe going?
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 01-20-2013, 12:18 PM   #4
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,762
Rewards Points: 2,024
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Is this a backflow valve?


I guess I should have asked what size the pipe was before I assumed it was a backwater valve. It very well could be a check for a sump I guess.
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 01-20-2013, 12:37 PM   #5
Newbie
 
Join Date: Jan 2013
Posts: 4
Rewards Points: 10
Default

Is this a backflow valve?


Thx for the quick reply.

It definitely looks like a 4 inch pipe, although it is difficult to tell precisely without digging a bit...My house is above the nearest manhole, although the pipe is 10 feet below grade.. I should mention that I have a flat roof. House was built 1979.

I have two of these, seems to concur with your answer.

Do you know how much a newer model could cost?

I wonder if I could just get by with some silicone to prevent sewer gas from coming in the house, my sump pump never worked and I highly doubt that water could back up into the house considering the general topography of the land here.
morronatico is offline   Reply With Quote
Old 01-20-2013, 01:32 PM   #6
Doing it myself
 
Alan's Avatar
 
Join Date: Apr 2006
Location: Crescent City, CA
Posts: 3,762
Rewards Points: 2,024
Send a message via AIM to Alan Send a message via MSN to Alan
Default

Is this a backflow valve?


It's not for sewer gas. That's what your traps and your venting system are for. It's to prevent raw sewage from backing up into your house.

Is the lowest floor of your house below the nearest upstream manhole? Are you sure that one is for your sump? Is it actually a sump, or is it a sewage ejector for the basement? Normally a sump or sewage ejector discharge is 2" not 4"
__________________
Journeyman Plumber
Alan is offline   Reply With Quote
Old 01-20-2013, 01:56 PM   #7
Newbie
 
Join Date: Jan 2013
Posts: 4
Rewards Points: 10
Default

Is this a backflow valve?


I understand what it is for, however, if it isn't sealed properly sewage gas would come into the house.

You are correct that the sump pump is connected with 2'' pipes, which confuses me as to why this pipe is 4 inch.

I have a downspout from flat roof which must never be blocked...which leads me to think that is the reason why I have two backwater valves...I think the sump pump 2inches pipes connect to this one and also a unused drain opening (for eventual shower) in basement bathroom.

Maybe it is a 3inch pipe?

Advertisement

morronatico is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Delta shower valve replacement on exterior wall muellertr Plumbing 6 01-02-2013 08:07 AM
Main Water Shutoff Valve problem obadran Plumbing 16 12-10-2012 12:45 PM
soldering copper pipe on a shower mixing valve. Ed911 Plumbing 7 05-17-2012 10:27 AM
Leaking pressure relief valve Chris Magee Plumbing 12 08-12-2008 08:48 PM
Toilet: water still coming from BOTTOM of Inlet Valve DIY Mom Plumbing 1 08-12-2008 01:43 PM




Top of Page | View New Posts