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Reasons Why Your Toilet Is Slow to Fill

From water leaks to sewage backups, there are many problems that your toilet can give you. Among these problems, and issues, is a toilet that…

May 05, 2026
Reasons Why Your Toilet Is Slow to Fill

From water leaks to sewage backups, there are many problems that your toilet can give you. Among these problems, and issues, is a toilet that is slow to fill back up after a flush. Though this issue is nothing to panic or stress over, Mr. Rooter Plumbing would like to give you some tips on this common occurrence. Again, this issue is not especially serious or expensive to resolve. Let’s get started on some reasons why your toilet is slow to fill and how you can have your toilet running optimally again. If you have any questions or conces, or if you would like to schedule an appointment with a certified plumber, then don’t hesitate to call Mr. Rooter Plumbing. We are available 24/7/365 for our community in Central New Jersey.

Our Customers Reviews

Larry R.

Howell Township, NJ

It was a late Saturday night. We had a super stubborn clog in some old galvanized pipes. Mr. Rooter send out Phil. Phil was great! He found the problem pretty quick. With determination and professionalism he final got it cleared out. I would recommend Mr. Rooter and Phil to anyone! He even cleaned up. We are so happy we choose Mr. Rooter!

Rose Bernard

Red Bank, NJ

We had a plumbing emergency and found Mr. Rooter while frantically searching for a 24-hour plumber. We feel like we hit a gold mine. Not only did we get a timely response. Everyone at Mr. Rooter was friendly, professional, competent and went above and beyond. Our plumber, Phil, was extremely helpful and gave us tips we could use moving firwars. Not to mention, the cost was extremely reasonable.

Joseph Chis

Hillsborough, NJ

Had sewer water backup in toilet and tub. Received callback as promised and arrived early. The tech determined we needed the main line to be cleared. He quickly located the opening and had us cleared in minutes. Very happy with the service. I was not prepared for the fee but it was an emergency.

Christopher Cox

Little Silver Township

Plumber, Phil, came out on short notice on a Saturday night and fixed our issue quickly, professionally and courteously. I contacted a different, well known plumbing company right before Mr. Rooter. The receptionist was rude and they didn’t call me back to say they couldn’t make it until after Phil left! The Mr. Rooter receptionist was very nice and they called me back quickly. I’m glad they did.

Debbie Dimitrion

Colts Neck, NJ

I just wanted to say James did a great job at my house. Excellent service, professional and very nice. Thank you so much for helping me with my plumbing problem. Did wonderful job.

Rachel Turunen

Jackson Township

I was very happy that I went with Mr. Rooter’s. The service was very quick and up front. Jessie James was very helpful answering my questions and replacing my hot water heater. He was pleasurable to do business with. If another problem arises in my home, I will be using this company again.

William Holden

Brick Township, NJ

A thorough, professional, pleasant experience. I had a back-up in the 50 year-old pipes of my new home. I called Mr. Rooter to have them locate the blockage, snake the line, and then use their video snake to get a visual of the integrity of the pipes. I’m glad that I called and will use them again for future needs.

LarJ MarJ

Oakhurst, NJ

You get what you pay for. Edwin Robles of Central NJ educated me as a 1st time homebuyer on why and what he was repairing, prevention, PROMPT,(on a sunday at that!) clean, knowledgeable, super professional but DOWN TO EARTH and at a REASONABLE PRICE! Sewer pipes unclogged and main water line fixed. I was no longer crying once job was thoroughly executed. After all $#@* $tinks but somebody has to do it and I HIGHLY recommend him and this company for a job well done. THANK YOU VERY MUCH!!

Margie Rafferty-Criscione

Ocean Township

Absolutely lovely office staff! I always knew when the repair person was coming. Lorenzo our repair guy was awesome, I really don't think there is anything he can't do. He looks young, but don't let that fool you! So happy all the repairs are behind us. We really just did a one-stop shopping and decided to have everything we've put off fixed because it was such a tremendous experience!

Reasons Why Your Toilet Is Slow to Fill

Three Possible Reasons

A toilet tank should refill in no more than a minute. If your toilet is taking longer than a minute to completely refill, then there are three possible causes:

  • Water Supply Valve: This knob often located on the wall behind your toilet controls the water flow into your toilet tank. If it is partially closed or if it has been clogged with a build-up of debris, then you can expect slow refills.
  • Waterlogged Float Ball: In older model toilets, there is a float ball that sits on top of the water in the toilet tank. This float ball controls the amount of water allowed into the tank. A waterlogged float ball will not allow the tank to fill efficiently.
  • Fill Valve Tube: The water from the water supply valve into the toilet tank is guided by the fill valve tube. Over time, this tube can wear down, misalign, clog, or otherwise malfunction. 

Troubleshooting These Causes

The troubleshooting for these causes is luckily fairly simple. The water supply valve’s knob can be tued to adjust the water flow. If tuing it to the completely open position does not resolve the issue, then contact a local plumber to check the water supply valve for blockages.
Check the water level in the tank. If the float ball is not floating near the top of the tank, then you might have a waterlogged float ball. A waterlogged float ball can be easily replaced, fortunately. Still, we recommend you upgrade to more mode components as a float ball is outdated.
Finally, inspect the condition of the fill valve tube. If you notice wear and tear or misalignment. Apply the respective resolution; replace a wo-out tube or realign a misaligned tube.

Call Mr. Rooter Plumbing

If you would prefer to have a certified plumber take care of any type of toilet repair or installation, then contact Mr. Rooter Plumbing anytime. Our live representatives are ready to schedule your flexible appointment. We are also proud to offer our top-tier plumbing services at every hour of the day. Our 24-hour emergency services are available for your convenience. Call Mr. Rooter Plumbing now to speak with a live representative and request an urgent dispatch.
 

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