Riosa Elongated Concealed Trapway Toilet

Model #:C43906-WH

What does this model number mean?

Color Shown: White
Toilet $448.30
List Price as
Shown (US $):1
$448.30
Exclusively available at Home Depot.

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Product Features and Benefits

  • RSL (Rigid Supply Line) model is available for use where required by State or Local Plumbing Codes.
  • Maximum flush power while saving you money, Delta 1.28gpf WaterSense labeled toilets are virtually clog-free
  • Features the exclusive SmartFit™ tank-to-bowl connection and SmartFit™ supply line, reducing potential leak points, over-tightening of the fasteners and cracking the toilet.
  • Delta toilet kit includes the tank, bowl, toilet seat, mounting hardware, SmartFit™ supply line, wax ring and SmartFit™ Multi-Tool. No additional tools required.
  • Delta® Toilets Limited Warranty
  • Featured Smart Features:

Watersense certified by CSA International

This product meets EPA criteria for WaterSense

Product Support, Repair Parts & Tech Specs

Support Information:

Installation Instructions / Owner's Manual

Installation Information

  • Gallons Per Flush: 1.28 gpf
  • Toilet Bowl Shape: Elongated
  • Bowl Height: Chair height
  • Seat Type: SoftClose/QuickRelease Seat
  • SmartFit™ Tank-to-Bowl Connection: Yes
  • SmartFit™ Multi-Tool: Yes
  • SmartFit™ Supply Line: Yes
  • EZ Out™ Toilet Removal Kit: Yes
  • Rigid Supply Line: No
  • No Additional Tools Required for Installation

Troubleshooting Resources

Reviews

Riosa Elongated Concealed Trapway Toilet 4 5 7 7
buyers remorse We purchased this toilet because the smooth sides would make bathroom cleaning easier and the chair height would be better suited to our aging parents. We were disappointed to learn upon installation that the toilet does not bolt to the floor, but instead is pressure fit to the flange. The toilet has proven impossible to stabilize and can not be tightened any further. This made the toilet unsuitable for our needs. I would also say that we were disappointed by the requirement of a special tool to instal the toilet, and also by the flimsy feeling of the provided seat. For a model at this price I certainly anticipated a design that was better thought out and of a higher quality. May 10, 2015
Great style and performance We were looking for a new toilet that would flush without clogging, and also do away with leaky tank bolts. We thought the tall tank made sense. It would have been nice if it came with a small tube of silicone, since I had to go buy a tube. Overall, it looks great in our bathroom and the strong efficient flush can't be beat! April 6, 2014
This product has great features but Love all the cleaning features,however I don't like the new hieght,because the seat is easy cleaning it's often lose.Worst of all it doesn't always take away the waist.That's real job. June 25, 2014
Sleek! Love this toilets sleek design and quiet yet powerful and efficient flush/fill. Knocking off a couple stars, however, because this new fancy concealed design has made it darn near impossible to install our Toto Washlet. If anyone knows of a work-around, I'd love to know about it! December 10, 2014
Great Product The toilet looks great, very modern and beautiful. They are very quiet when operated and easy to clean. August 18, 2014
Really like our Delta Riosa toilet We like this toilet! It provides a strong flush while using only 1.28 gpf. Being that this was the first Delta Riosa toilet our plumber had ever installed, it took him a bit longer than usual. Installation will go faster when he installs our other two Delta Riosa toilets. The concealed sides of the toilet make it much easier to clean. July 11, 2015
Surprizingly Great Customer Focused Product The product was easy to install. Project completed in less that 2 hours. May 23, 2015
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From time to time, Delta Faucet Company runs sweepstakes in connection with its Ratings and Reviews. Certain of the reviews posted above on this page may have entitled the author to a sweepstakes entry.

Customer Q & A

(8 Questions : 11 Answers)

Product Q&A

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1 answer

Does this Riosa model come in any other color than white? Please let me know! Thank you.

Topics: Features
2 months ago
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Kim
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Answer: 
Hi Kim, Thank you for your question. Unfortunately the model C43906-WH is only available in white.
Thanks,
Dave
Skill Level: Advanced
2 months ago
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2 answers

How to install this type of model with bolts are on side instead of normal position

show me how to
Topics: Assembly
5 months, 1 week ago
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handy dad
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Answer: 
Hi Handy Dad, Thank you for your question. An L shaped bracket is attached to the flange and bolted down. Screws then run through the side of the toilet bowl and thread into the vertical portion of the bracket to hold the bowl in place. Pages 2 and 3 of the attached manual for the model C43906-WH cover this part of the installation.
http://www.deltafaucet.com/customer...
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Dave
Skill Level: Advanced
5 months, 1 week ago
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Answer: 
There are enough holes in the mounting bracket that, unless you really messed up their installation, you can easily hit one of them.
Age: 55 to 64
Gender: Male
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate
2 months, 1 week ago
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Wisconsin, USA
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1 answer

Loose toilet seat

How do I tighten a loose toilet seat on Riosa C43906 toilet?
Topics: Care/Maintenance
Age: 55 to 64
Gender: Male
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate
5 months, 3 weeks ago
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Joe
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Answer: 
Hi Joe,

Thank you for your question about the Riosa Elongated Concealed Trapway Toilet. The screw will advance, then continue to turn, continue doing so until you are unable to any longer.

Thank,
Nick
5 months, 3 weeks ago
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The seat is a major show stopper on an otherwise very good idea. I will be returning the toilet to Home Depot if I cant replace the seat ASAP, the toilet is unusable.
Topics: Assembly
6 months ago
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bigraz
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Answer: 
Hi bigraz,

Thank you for your question about the Riosa Elongated Concealed Trapway Toilet. To tighten the screws properly, you have to keep turning the screw, it does turn and tighten, but you want to continue to turn until you can not turn anymore. If it continues to be an issue, you can call into us and we can replace it, or you can find a different seat, and install it. To receive a replacement, you can call us at 800-355-2721.

Thanks,
Nick
6 months ago
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Answer: 
Call the company, they will send you a replacement seat for free. It's a manufacturing defect.
2 months, 1 week ago
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1 answer

Please provide the trapway diameter (ball-pass) in inches. Also confirm that the trapway is glazed.

7 months ago
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Diane
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Answer: 
Hi Diane,

Thank you for your question about the Riosa Elongated Concealed Trapway Toilet. The trapway is a glazed 2 inch diameter.

Thanks,
Nick
7 months ago
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Has there been any reported problems with leaking at the waste flange.

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Tomg
Oakland Charter Township, MI, USA
I had installed this toilet and a few days later it began to wobble and leak when flushed. I then had a pro plumber reinstall it and he said that the ceramic flange that connects to the waste pipe was to shallow to make a good connection with the wax ring. Does this sound like a reasonable explanation? He finished installing it but it still rocks even with shims. Very disappointed!
Age: 65 or over
Gender: Male
Project Type: Replacement
Ownership: < 1 year
Skill Level: Intermediate
8 months ago
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Tomg
Oakland Charter Township, MI, USA
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Answer: 
Hi Tomg,

Thank you for your question about the Riosa Elongated Concealed Trapway Toilet. To fix the leak, you would have to purchase a extra thick wax ring or a flange extension ring. The flange should be level with your floor, or just above. If the toilet is wobbling, the bolts need to be tightened down more.

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Nick
8 months ago
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2 answers

Can other (wooden) seats be used with this toilet?

While the quick-release is interesting, it's not worth it if it means having to use a plastic seat. I'm not at all a fan of plastic seats or lids. Can a regular wooden seat be used? I'll presumably have to remove the quick-release fitting to use a different seat. Are the holes a standard spacing?
Topics: Features
10 months ago
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Sean
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Answer: 
Hi Sean,

Thank you for your question about the Riosa Elongated Concealed Trapway Toilet. Delta Toilet Seats are made Standard. A regular elongated wooden seat can be used.
10 months ago
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Answer: 
Yes. there are "normal" seat mounting holes for you to use.
Age: 55 to 64
Gender: Male
Project Type: Replacement
Ownership: < 1 year
2 months, 1 week ago
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Wisconsin, USA
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1 answer

can the gpf be adjusted to 1.6 gpf?

home depot specs show Gallons per Flush Range to be 1.28 to 1.59. is this adjustable?
Topics: Performance
1 year, 7 months ago
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AMY
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Answer: 
Hi Amy, Thank you for your question. The model C43906-WH uses 1.28 gallons per flush. The flush is not adjustable.
Thanks,
Dave
Skill Level: Advanced
1 year, 7 months ago
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  1. The manufacturers list price (U.S. dollars) is shown for comparison only. The actual retail price may be different from the price shown.