Model # 3/4 LFN45BM1-U

Internet #205073410

Store SKU #413611

Watts 3/4 in. Brass MPT x FTP Pressure Reducing Valve
0098268703870

Watts

3/4 in. Brass MPT x FTP Pressure Reducing Valve

  • Body is made from a durable, lead-free brass
  • Helps limit water consumption, saving you money
  • Easily handles up to 400 psi
$5289 /each

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Product Overview

This water pressure reducing valve is designed to reduce incoming water pressure to a sensible level to protect plumbing system components and reduce water consumption. It consists of stainless steel integral strainer, thermoplastic seat module, thermal expansion bypass and a sealed spring cage for outdoor or pit installations. In addition, all parts are quickly and easily serviceable without removing the valve from the line.

California residents: see   Proposition 65 information

  • Lead-free brass body construction
  • Helps to reduce water consumption
  • Integral stainless steel strainer is removable for cleaning
  • Pressure range is suitable up to 400 psi (27.6 BAR)

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Can I adjust down to 90 lbs ??

Asked by: Diver
yes you can adjust it down. I set mine at 50lbs. just the screw out and lock the nut..
Answered by: gary
Date published: 2017-05-23

How would I install this in between 3/4 inch cpvc pipe?? Would there be a likelihood of failure using it in cpvc?

Asked by: chris
I'm not a professional plumber, so for what it's worth, you would need a stiffener to go inside your cpvc pipe. Instructions are included with the valve.
Answered by: Richard
Date published: 2017-06-15

Which direction do I turn the adjusting screw to decrease the pressure

Asked by: Tom
Counter clockwise. Since clockwise would compress the spring and open the valve further to increase pressure, you would do opposite to decrease pressure.
Answered by: KevinL
Date published: 2017-06-14
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Customer Reviews

3/4 in. Brass MPT x FTP Pressure Reducing Valve is rated 2.2 out of 5 by 13.
Rated 1 out of 5 by from I have stopped using them because they make the... I have stopped using them because they make the pipes sing. I always have to adjust them higher and even than it still doesn't make it quit
Date published: 2017-02-01
Rated 1 out of 5 by from The positive: It theoretically can reduce the pressure. I have a pressure gauge installed on th... The positive: It theoretically can reduce the pressure. I have a pressure gauge installed on the water heater, and I can adjust the regulator, and measure the resulting pressure changes. The negatives: It resonates internally and makes the pipes HOWL when water flows. There is vibration coming from the diaphragm that I can feel. Clamping the pipes does not stop it. Adjusting the pressure in the expansion tank does not stop it. The only way I have found to mute the noise is increasing the pressure to > 60 PSI, but that starts to defeat the purpose of a pressure regulator. Wasted money.
Date published: 2017-05-10
Rated 5 out of 5 by from Installed easily, nothing fancy but works just as designed to reduce the city pressure coming int... Installed easily, nothing fancy but works just as designed to reduce the city pressure coming into my home to a consistent and safe pressure. This replaced a 20 year old unit that had not failed but the piping around it needed to be re-worked so that was the time to go ahead and replace it. Yes, the bell is plastic and not brass and only time will tell if this will last another 20 years as the last one did, but for my purpose combined with the ease of installation and the savings of doing it myself--well worth the purchase and happy I did it.
Date published: 2017-01-18
Rated 1 out of 5 by from Leaks Sometimes A few months after installation I discovered that it leaked. I shut the incoming water off while I went on vacation. When I returned and turned the water back on, about 1 or 2 quarts of water leaked out at the joint between the (black plastic) spring cage and the valve body. I emailed Watts Support and they told me to tighten the spring cage 1/4 turn. I couldn't turn it any tighter. They said, "I am wondering if it is a temperature thing with the plastic and the brass getting used to temp change from no water flow (after a week) to full flow after vacation." They said, if I thought it was faulty I should return it. Well, now I have to wait for a time when I can shut the water off for a few hours while I remove this valve, return to HD, get a new one, return and install the new one. Anybody giving odds the new one will do the same thing?
Date published: 2016-07-01
Rated 2 out of 5 by from Bought this LFN45B-M1 valve to replace a discontinued N35B valve because it could be installed wi... Bought this LFN45B-M1 valve to replace a discontinued N35B valve because it could be installed without alterations. The reviews I read on this valve were not that great, but the reviews for the 1" version were good. The installation is easily done. The first valve I purchased leaked at the junction of the plastic spring cage and the valve body. The leak was probably from the diaphragm not sealing. l took it back and got a second valve. It did not leak, but I now have been chasing strange vibration noise or a humming sound coming from my pipes. Whether this noise is being caused by the valve, I cannot be certain, but I did not have the noise before, and I can feel the pipe vibrate just after the valve. Therefore, I don't feel qualified to be able to recommend this valve or not. I just want to report my experience with the valve.
Date published: 2016-10-25
Rated 1 out of 5 by from Easy replacement after First one failed after only 20 months Disappointed that the first one failed so quickly. Pipes started to vibrate near one toilet. At first I investigated all other plumbing devices and pipes. Just didn't think the PRV could be the problem because it was so new. Vibrations got worse. Decided to go with same model because of ease of installation. Hope it lasts longer.
Date published: 2017-06-07
Rated 5 out of 5 by from Just what we needed Just what we needed
Date published: 2017-04-25
Rated 1 out of 5 by from Noisy - Heard Throughout House This unit oscillates internally, producing about a 400 Hz tone which is carried by the water piping and heard throughout the house. I wrote to Watts and they wrote me back saying that this whole N45B series of regulators has too small an orifice for normal home usage. It is meant for much smaller flow rates. Watts wrote, "The orifice opening is too small, we recommend the standard LF25AUB, or LF U5B higher capacity valves. They offer a larger flow opening with no noise." This valve is not suitable at all for home usage. Home Depot should not even offer it for sale.
Date published: 2015-12-14
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