Question about Plumbing

1 Answer

Cutting cast iron soil pipe

I need to replace part of my cast iron 4 inch soil pipe with PVC.

What is the cheapest and safest way to cut the pipe to allow me to couple into to it ?

I do not want to smash it with a lump hammer incase I damage the pipe below ground, I would also like a neat finish to the edge of the cast iron pipe.



Phil Harrison.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 374 Answers

Phil, I recommend a ratchet snap cutter as it will allow you to cut the pipe in a clean manner. These are available for rent at most major home improvement stores in the US. One can also rent one at a tool rental company. I rented mine for $35.00 the bulk of which was a deposit on the tool. Just a reminder when buying the coupling device ensure you ask for or get a 4 inch cast iron to 4 inch PVC coupling. A bit of vaseline will help you get the neoprene coupling to seat properly with the PVC if you encouter resistance. Good luck. If you need more assistance let me know.

Posted on Sep 26, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What is theproblems in using cast iron valves for water pipeline

For drain pipes (waste water) they're fine.

But for potable water (fresh water), the cast iron could rust, allowing the rust to get into the water.
Also, the iron could leech into the water.

Apr 28, 2014 | Plumbing

1 Answer

Installing a new toilet/bathroom upstairs, no soil pipe how do I find the sewer drain and hows the soil pipe attached

please hire a plumber, or a plumbing consultant. there can be many issues with installing a bathroom upstairs. Plumbing is not your only issue, you must think about other building codes as well, including the structure. you can't just start cutting!

Jun 13, 2010 | Plumbing

1 Answer

Need to reconnect threaded pvc connections in drip system. Had to CUT out the valve, now am stuck with only threaded connections and no room to add a union.

By drip system you mean watering a lawn or garden? If so, you can cut off one of the threaded connections (far enough) back) to leave enough room for another threaded end, and a union.

May 11, 2010 | Plumbing

1 Answer

Digging hole and have cut the top of the rainwater tank pipe about 500mm in the ground, pipe is pvc and 90mm round

The tank is 19&11/16 deep. the pipe is 3in PVC, SCH40. I will need a reciprocating saw w/8in blade, a peice of 3 in pipe 4 ft long and 2-3 in of SCH 40 slip couplings or 2-3 in compression couplings. ,Pipe joint compound, Glue and primer if using the slip coupling If your using the compression couplings,2-24 in pipe wrenches and a spade.Dig the line up exsposing the broken pipe plus about 12in to 18in more pipe on each end..Cut out the broken porsion plus 8 to 12 inoneach end leaving 6 in or more pipe on each end to tigh on to,Measure the distance of pipeyou have cut out .Cut your replacment pipe 1in shorter than the peice you cut out Slide your comp, couplings all the way onto the replacment pipe .Manuver pipe into place .Slide the comp, couplings onto the exsisting pipe half way,splitting the distance in the middle of the couplings.Put pipe joint compound on the threds and a little on the bevel of the rubber union gasket Tighten the couplings evenly.Check your grade it needs 1/8 in p, ft If its all right then backfill to the top of the pipe and tamp the earth making sure the pipe is commpleatly secure then back fill the rest of the ditch in 6 in increments tamping between layers.

Nov 03, 2009 | Plumbing

1 Answer

I have a older home with very slow hot water flow. Is there anything I can do myself? The pipes are cast iron.

Have you tried removing the aerators from the faucets and cleaning out the sediment. You can also drain down the water tank to try and remove any sediment that has settled in the bottom.

Sep 21, 2009 | Plumbing

1 Answer

Moved into house with damaged joint in external soil pipe from upstaira shower room

You didn't state the size of the pipe or if it is PVC(plastic) or Cast iron. Two rubber couplings can be used to repair the joint. A 12" section, 6" on either side of the joint needs to be cut out. Cut a piece of schedule 40 drain/waste pipe same diameter as existing pipe to size(just under 12"). Take two rubber couplings (sized for your pipe) and place on each end of pipe joint, and tighten clamps.
This fix will work on cast iron pipe, but there may be another means of repairing the joint, so get back to me with more info about the pipe and joint.

Aug 02, 2009 | Plumbing

1 Answer

I have a leak in a 3 inch pvc straight section of

Add a U-bend to the pipe. You'll have to cut out the bad section, then add 90 elbows to each end. Then you can install the repair piece by slipping it into the two ends.

Jul 30, 2009 | Plumbing

1 Answer

Can't remove broken PVC pipe from bathroom wall...need to install new faucet

there should be an acess pannel there somewhere too get too it ,if not then you will have too cut the wall and replace the pipeing

Apr 15, 2009 | Plumbing

2 Answers

Broken pvc plumbing for bathtub faucet.

if you have tiles in the bathroom wall, the answer is yes!
it is better to go fromthe back, where there is drywall.
since PVC is glue on, you have to cut out the pipe and reconnect.
make sure the bathtub faucet is not broken, and can be reuse.

Nov 11, 2008 | Plumbing

Not finding what you are looking for?
Plumbing Logo

Related Topics:

1,445 people viewed this question

Ask a Question

Usually answered in minutes!

Top Plumbing Experts

Brad Brown

Level 3 Expert

13796 Answers

Tom Chichester

Level 3 Expert

26238 Answers

Gil Shultz

Level 3 Expert

3320 Answers

Are you a Plumbing Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides