Softener and Whole House Filter Drains: Is this OK?

Thank you to all the plumbing professionals who offer their advice and expertise

Over 698,000 strictly plumbing related posts

Plumbing education, information, advice, help and suggestions are provided by some of the most experienced plumbers who wish to "give back" to society. Since 1996 we have been the best online (strictly) PLUMBING advice site. If you have questions about plumbing, toilets, sinks, faucets, drains, sewers, water filters, venting, water heating, showers, pumps, and other strictly PLUMBING related issues then you've come to the right place. Please refrain from asking or discussing legal questions, or pricing, or where to purchase products, or any business issues, or for contractor referrals, or any other questions or issues not specifically related to plumbing. Keep all posts positive and absolutely no advertising. Our site is completely free, without ads or pop-ups and we don't tract you. We absolutely do not sell your personal information. We are made possible by:

How to Show Images

Newest Subjects

Softener and Whole House Filter Drains: Is this OK?

Author: josephmomma (PA)

I'm hoping to get some confirmation (or flack) for my whole house carbon w/backwash + water softener drain plan.

Details:

- Both Fleck 5600SXT valves
- No floor drain
- Sewer is about 4 ft up and let's say max of 10 ft 'over' from the discharge on the Fleck valves
- Builder provided 3" > 2" wye with 1 ft cap for a future grinder pump for roughed in basement bath. The pit is directly below the wye.

We do plan on adding a full bath in the basement (Shower/tub, sink, toilet)
Picture of proposed drain location and plan: [i.imgur.com] (Sorry, I tried and failed at a Google SketchUp).

My plan: Cut the cap, then add a 90 away from the back wall/rim joist. 4" of 2" straight > wye + trap > 4" of 2" straight > wye + trap > 4" of 2" straight > cap. Once I add the bath/grinder pit, I will cut the cap and add another wye/trap.

Questions:

- Is there a better approach? Following code is important to me. I would prefer to avoid cutting the 3" main if I can.
- Is this 2" drain enough to support these 3 items? Do I have a vent?
- Are 2 traps really necessary? Any way to get both the softener and the filter in the same trap? I'm thinking sink/dishwasher.
- Is flex line from the Fleck discharge to trap ok, or should I use PVC? I've seen mixed opinions on this since I'm going overhead.
- How far 'down' the existing wye should I cut before I add the 90?

Re: Softener and Whole House Filter Drains: Is this OK?
Author: packy (MA) the outlet for the grinder pump does not disharge into trap. it ties in directly. any trap you add for your backwash etc must be vented. you will need a vent for the grinder chamber and vent/s for your new bathroom. look around for a "future vent" in the ceiling.
Post Reply

Please note:

Inappropriate messages or blatant advertising will be deleted. We cannot be held responsible for bad or inadequate advice.
Plbg.com has no control over external content that may be linked to from messages posted here. Please follow external links with caution.
Plbg.com is strictly for the exchange of plumbing related advice and NOT to ask about pricing/costs, nor where to find a product (try Google), nor how to operate or promote a business, nor for ethics (law) and the like questions.
Plbg.com is also not a place to ask radiant heating (try HeatingHelp.com), electrical or even general construction type questions. We are exclusively for plumbing questions.

Search for plumbing parts on our sponsor's site:

Plbg Advisor List Common Plumbing Terms Find A Plumber Plumbing Manufacturers Directory theplumber.com

Special thanks to our sponsor:

to FAQ's - to popular subjects - to plumbing books - to Tankless 101 - to plumbing history - to helping charities - to contact us