Author Archives: jsxx

Conservacap Use with A-36-A (4.5 gpf) Kits

Any problems using Conservacaps with 4.5 gpf kits.  If not, what is the amount of water savings per flush?



NO PROBLEMS WHATSOEVER !   Keep in mind that Conservacap shortens a flush cycle about 22% (ie .75 gal savings on a 3.5 gal flush).   A 22 percent reduction of 4.5 gal is right on 1 gal per flush savings.

Also, keep in mind that there is a tremendous amount of redundant water use built in those 4.5 gpf kits.  Most toilets will flush with almost half that amount of water use,  which is why the 4.5 gal kits today can be converted to use 3.5 gals by just turning the flow ring over to expose the rough surface instead of the smooth side.  That little trick will save a full gallon of water per flush right there.  Then add the Conservacap and you are saving almost two gallons per flush.

NOTE:   Not all of the  A-36-A kits have the water saving conversion factor built into them.   Not long ago, I got a call from a fellow who said he worked in purchasing for the GSA in Chicago.  He asked about using Conservacap with his 4.5 gal kits and when I mentioned saving water first with the conversion and then using Conservacap, he told me that his kits were older and they didn’t have that feature available.

“That’s too bad,” I told.  “How many of those older kits do you have?”

“Millions,”  he said.

We are still waiting for that order…



Five Frequently Asked Questions


How does the Conservacap actually work?

ANSWER: The size of the inner cap cavity is minutely smaller than a Sloan or Zurn Cap. The difference in the blue and red cap is less than .002 of an inch and it equates into a ¼ gal of water savings. When the cap cavity becomes filled with water, the flush cycle ends. This shorten flush time, usually by several seconds, creates the savings. It does not affect the pressure or force of the water flow in any way. The fixture flushes just the same as it always does. It just shuts off sooner. Anybody that flushes 40 sheets of toilet tissue and watches the bowl clear, and then watches four or five seconds of water continue to run through the system can understand the basic principal.

How can a plumber be assured that there won’t be additional maintenance issues from using Conservacap?

ANSWER: The best way is to install several in your most active restrooms and watch their performance. Also, most plumbers appreciate the fact that the product was designed by plumbers who were doing turnkey installations and did NOT want to have call backs. Many plumbers are also concerned about installing new 1.6 gpf low flow fixtures into older sewer systems. This was the case in Nashville Airport project. These folks have 400 toilets flushing a couple hundred times a day each. That’s pretty good testing.

How does reducing flow of water actually improve performance of the 3.5 gpf toilets?

ANSWER: Again, Conservacap DOES NOT reduce the flow of water. The flow, force or pressure of the water is all the same, before and after. The flush cycle just ends sooner. Conservacap improves the performance of the fixture by making it function more efficiently. We don’t make it flush harder or any better than it did before. We say it flushes as well with less water.

How important is it that a new repair kit be installed with each Conservacap?

ANSWER: Conservacap will always save water when you install it. We know that we have had thousands of Conservacaps installed in older systems without benefit of a new A-38-A, or A-37-A repair kit. If the diaphragms in your system are in good shape feel free to simply install the Conservacap. Because the cap and diaphragm work and in many cases, wear together, to assure optimum performance we recommend installing a new kit at the same time the conservacap in installed.


How does the use of auto flush units affect the water savings one might get with Conservacap?

ANSWER: Auto flush units do not normally change the amount of water you use per flush; they just increase the amount of flushes. So, contrary to saving water, facilities converting to “No Touch Systems” are always going to see their water usage go up. In fact, if existing Sloan or Zurn 3.5+ gpf fixtures are converted to “No Touch Systems” (usually done by replacing the existing handle kit with an auto flush unit) a considerable increase in the amount of water consumed will occur. This is particularly noticeable in schools where many times less than 50% of the students flush on a regular basis.” In these cases, the additional benefits of saving water with Conservacap will become very obvious.” 

Will Reduced Water Use Affect our plumbing system?

G’ Day Jimbo

This is the only note I have ever sent this Simbach guy.  And notice that it was back in Feb, before I left for Australia.   They didn’t fire that plumber because of this.  They fired him for putting 4.5 gal kits in all of the 1.6 gal fixtures.

Fixx it

—– Forwarded Message —-
From: Frank Fixx
To: John Simbach
Sent: Tuesday, February 13, 2012 1:05:20 PM
Subject: Water Saving Ideas


Your plumber is either out of the loop or he is lazy.  Take your pick.

Since many of us plumbers are lazy,  I’m incline to think it is the latter.  To us, less water could mean more work (maintenance), so many plumbers are reluctant to buy into any thing that saves too much water.  There have been thousands of Conservacaps installed in fixtures all across the county and I have never heard anyone say that they didn’t produce enough water to keep the lines clear, so your boy is all by himself….for the moment.

If you want to see a complete turnaround and change of attitude, tell your plumber that since the water saving caps won’t work for your facility, that he should start getting price quotes on new Sloan and Zurn flushometer 1.6 GPF low flow toilets.  Also, ask him to provide you with a timetable for how long it will take him to install all of the new fixtures.

“Glory Be!” he is going to tell you within a week’s time.  “I’ve retested those water saving inner caps…and now they seem to work just fine.”  This has happened with us more than once.

Good luck and write me back if any advice I ever give you works.  I don’t want to hear about it if it doesn’t.


John Simbach  wrote:

Frank Fixx,  UEllc

Hey Frank:

Thanks for the advice on using moderators over aerators in our common area sinks.  We installed the .5 GPM and they work like a charm.

Another questions please.  Several of our off campus buildings  recently installed Conservacap in their flushometer fixtures and are impressed with the water savings and like the performance.  I gave our plumber here some of them to try in our main building and he tells me that they didn’t work at all (caused stoppages, etc)  and that he really doesn’t want to use less water in our facility because of the building’s age.   Our building is newer than the other facilities where the caps seem to be working well.  I don’t understand why these things won’t work for us here.

Please advise



Facility Manager, USC Buildings