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July 20, 2014
Toilet Flushing Itself? San Diego Plumber Explains A DIY Fix In 5 Minutes

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Colepepper Plumbing & Drains

How to fix a running toilet:

If you live in San Diego, Plumbing problems tend to happen to often. Toilets use up to 26% of total water use in your household. That is a significant amount of your water bill. If you detect excess water running in your commode, it makes complete sense to fix it, right away. Otherwise, you are throwing away water, we mean money and most folks just can’t afford it. Let us tell you how to fix running toilet.

The first step is to remove the lid when the toilet is running. A bit of observation can save you time and money.

Fix a San DIego Running Toilet:

1. Often the part causing issues is the flapper. This is the rubber piece at the bottom of the tank that seals the tank from the drain. If it is not doing its job properly, the water tank never fills up enough for the float to stop the water flow. It is an easy fix. Either clean and reset the device, or simply purchase a new one. These are available at any hardware store and install easily.

2. The chain connecting the rod to the flapper may not be adjusted properly, making a proper tank seal impossible. These can usually be lengthened by adjusting the links. If it is too rusted, it is easily replaced. Measure the length of the old one and add an appropriate length to allow the flapper a proper seal.

3. Sometimes the floater will get out of adjustment with age and not be aligned properly to shut off the water at the proper level. This leads to a lot of water wasted. There are usually adjustments on these that can be made so it works properly. These allow various height settings so the water is shut off in a timely manner. Some older toilet floats can be adjusted by simply bending the metal rod to the proper angle.

Most hardware stores now carry complete rebuild kits that repair the vast majority of San Diego toilets. Most are basically plastic, and eliminate the metal rod that is standard equipment on older units. A kit such as this should fix any problem in the floater/flapper area if you can’t isolate the source of your malfunction. If you have an older unit, a complete rebuild is not a bad idea. A little preventative maintenance will save money in the long run.

Another possibility is a leak in the toilet tank itself. If the seal between the tank and bowl has gone bad, the water level will continue to be low, causing a waste of water. A good way to test it is to put some dye in the tank, and see if it bleeds down to the toilet bowl. If it does, clean the seal and retest. If not, you have a porcelain crack that will require tank replacement.
A running toilet is the sound of a waste of water and money. Often, the fix is simple and inexpensive. Get involved with it right away to keep your water loss to a minimum.

Of course, if the problem is beyond a basic fix, contact your local plumbing professional to come in and inspect the unit. A serious leak can be very costly. A wet subfloor can be just the beginning of significant water damage throughout your home. If you live in San Marcos plumbing companies are listed in the San Diego area, it is wise  to find one that offers 24 hour services, because it seems like toilets always run at 2 AM.

Need toilet repair? We work all of San Diego including: Bonita, Lakeside, Mission Valley and Del Mar. Call us at 619-838-1322 to schedule service or click here.

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Nikki L
9 October 2026
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I'm so glad I found this plumbing company! From the very first call, they were incredibly responsive and got back to me right away. They went above and beyond and truly exceeded my expectations. It's rare to find a service company that cares this much about doing the job right. I highly recommend them to anyone in San Diego who needs a plumber. ⭐⭐⭐⭐⭐
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Hachiware
8 October 2026
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Sam helped us replace the water heater. Very nice service. He also showed us how to flush the water heater by ourselves. Would highly recommend this company and technician!
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Ming J
8 October 2026
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Sam did a great job replacing our heater and helped me with the tips on how to flush the heater. He also throughly checked our house and pointed out all potential problems with our plumbing system. I would definitely hire him to all future plumbing works
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Jeffrey H
8 October 2026
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We live in Aviara in South Carlsbad and called Colepepper due to a toilet that was backed up. They came the next day and resolved the issue promptly. Excellent service at a great price!
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Steven W
7 October 2026
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Came out in del sur on quick notice to help replace a leaking sink disposal and fix a running toilet. Friendly and fair!
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Kelly S
2 October 2026
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Worked on our two bathroom sinks and Carlsbad. Replaced shut off valves and everything’s brand new and shiny!
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They showed up today to clear my lines. Sam did a great job and hydro jetted the whole line. Definitely going to recommend to my neighbors.
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30 September 2026
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Sam did a fantastic job. Efficient, and everything works great.
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Mary T
28 September 2026
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Sam was our go to guy over the last month of work at our home in Rancho Bernardo. We had old cast iron pipes and needed them replaced under the concrete slab. Sam explained the process and timeline and was always above and beyond helpful.
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Naoki N
23 September 2026
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We had a plumbing issue, when I drain the bath tub water, dirty water backs up from the kitchen sink. Sam correctly identified the root cause of the issue (cast iron pipes downstream of the kitchen completely clogged), replaced them with new pipes, santee, and new branch arms, and resolved the issue quickly. He was very professional, cleaned up floors after the work was done, took the garbage with him. I highly recommend this company and Sam!
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Connor M
22 September 2026
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Repaired garbage disposal in mission valley, great work!
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Laura S
22 September 2026
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We really appreciated the fast thorough work at our home in Clairemont. Highly recommend. Thank you so much.

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