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Question DetailsAsked on 8/26/2016

Cost to Adding another clearing line to bathrooms that are back to back? What's a category?

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Cost depends greatly on access to the stub end of the DWV (drain/waste/vent) line - could run from as low as around $200 in very easy access case (not including any drywall repair or repainting to repair the access holes to put it in), could be as high as probably $500 or so in bad access situations.


Four things to check out or consider -


1) whether the basin is "upstream" in the flow path - so might be able to disconnect the basin trap and access through the basin drain line with a snake as needed to clear clogs downstream near the toilet or tub/shower as needed.


2) having to clean out a DWV line, especially the in-house portion, is pretty rare - clogs in the above-ground portions are usually in the traps or right at the fixtures. Might be that the common additional (on top of the snaking/jetting itself) $50-100 to remove and remount a toilet to use the toilet riser for cleanout access when needed (typically only every 10-20 years if that often) might be a lot cheaper than putting in a new cleanout stubout on the line considering the few times it will be used - especially if you have it full-diameter routed or jetted out now rather than just snaked, so the pipe is cleaned full-diameter to near-new condition (so should be a long time till it clogs again).


3) do you have a vent riser coming off the upstream end of the DWV stack - could be a snake or small portable router or jetting outfit could clear the line from the roof, coming down through the vent into the stack - commonly done. Not that plumbers or sewer cleaners really LIKE doing that, but most such outfits will do it.


4) WHY do you need a new cleanout access - if the stack is clogging up frequently, is this due to broken pipe, improper line slope, backing up of solids into the vent line causing venting failure, or what ? Or is this perhaps a clogging in the main sewer to the street backing up to the lowest elevation drain in the house - meaning maybe you have damaged in-ground pipes, or need a full-diameter cleaning all the way to the street for commonly $200-400 range. Clogging DWV lines are NOT normal - except for having to full-diameter clean the lines all the way to the street every 10-20 years or so to remove the buildup of grease and soap scum and paper fiber that builds up and reduces the inside line diameter, eventually leading to clogging and backups.


Search the List category - Sewer and Drain Cleaning for full-diameter pipe cleaning, Plumbing for minor snaking (some larger plumbing outfits do have full capability sewer cleaning equipment) or for any piping modifications/addition.


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If by "clearing line" you mean the manifold tying all the fixtures together, forming the upstream end of the "stack" - so you are looking at changing a one-line DWV with two bathrooms worth of fixtures coming into it to two separate DWV lines (opne for each bathroom) which would then come together at the stack riser. Probably more on the $1000 or possibly even higher ballpark range for the plumbing depending on accessibility, possibly as much as a thousand or two carpentry if this DWV manifold cuts crosswise to the floor joists anywhere, and probably a good thousand minimum or potentially substantially more for subfloor repair and new flooring - because generally this would be done from above (through the flooring) rather than below UNLESS you have open joists below the bathrooms (like in a crawlspace or basement), in which case the flooring costs and possibly the carpentry costs would go away. Depends a WHOLE bunch on your current piping configuration, and of course somewhat on what type of piping you have now - you would want several bids on this, and unless your DWV manifold is exposed under the floor and does not involve cutting through joists to install it, would want a General Contractor rather than just a Plumber to handle the carpentry and flooring and such as well in one contract.


Note if you decide to go ahead with running two lines (one for each bathroom) and access has to be through the floor in the bathrooms, might be a good time to consider if you want to do a general bathroom remodel at the same time because you will already be paying a substantial amount for the repairs needed and probably new flooring as well anyway - so would be a good time for a general upgrade if you so desire.

Answered 2 years ago by LCD




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