Well I discovered that the model i had was a Delta 1500 series Monitor faucet. Through internet searches I found a Delta conversion kit. It upgrades your 1500 series to the newer 1700 series. Part # RP29405. It comes with a cartridge, new springs and gaskets, bonnet nut, sleeve, shower head w/chrome neck, and complete 1700 series handle assembly. Everything is chrome. It turns out that the 1500 series uses the universal valve so the 1700 series cartridge fits in it.

A couple of tips to using the conversion kit. First it comes with 2 sets of gaskets that sit in the back of the valve housing. Use the thicker ones. I used the skinnier ones because they were the same size as the old ones I removed, but it still leaked after I screwed the bonnet nut on. I finally tried the thicker gasket (the thicker ones are connected to each other) and it sealed it right up. I believe the 1700 series cartridge is slightly shorter than the old 1500 cartridge and thus why the thicker gasket was needed. Second tip is the new shower head might not fit on your old neck. Mine didn't and I wasn't in the mood to change that out just yet, so I have chrome handle and back plate with the brass/gold shower head and tub spout. I have both pieces, but I'll save that for another day. Right now the shower is back to working with full pressure hot and cold. Now I just need to replace the water heater elements and I'm back.

If you have a 1500 series faucet and want to upgrade to the 1700 series. All you really need is a 1700 series cartridge and a 1700 series handle assembly. If you can find the handle assembly separate locally or on CL or something you can make the conversion much cheaper possibly. I ordered the conversion kit from Amazon + the chrome tub spout with pull down shower activator for $128 shipped, 2 day Amazon prime. Not too bad. Hope this helps someone down the road.

Sorry for the lack of pictures. I was fighting this thing in low light and no help. The instructions that came with the kit didn't help much.

Answer from Gravy on Stack Exchange
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Instructables
instructables.com › workshop › repair
How to Change the Cartridge of a Delta Monitor Shower Valve. : 8 Steps - Instructables
October 29, 2017 - (Shown in picture 1) Tip: If the cartridge will not come out, the cartridge can be removed with tongue and grove pliers (shown in picture 2), or the needle nose pliers may also be used.
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JustAnswer
justanswer.com › plumbing › 375hh-not-cartridge-delta-monitor-shower.html
Delta Monitor Shower Cartridge Removal: Expert Help & Tips
To remove a tight Delta Monitor shower cartridge, first turn off water supply. Use a cartridge puller tool designed for Monitor series to avoid damage. Apply penetrating oil around the cartridge base to loosen mineral deposits.
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Well I discovered that the model i had was a Delta 1500 series Monitor faucet. Through internet searches I found a Delta conversion kit. It upgrades your 1500 series to the newer 1700 series. Part # RP29405. It comes with a cartridge, new springs and gaskets, bonnet nut, sleeve, shower head w/chrome neck, and complete 1700 series handle assembly. Everything is chrome. It turns out that the 1500 series uses the universal valve so the 1700 series cartridge fits in it.

A couple of tips to using the conversion kit. First it comes with 2 sets of gaskets that sit in the back of the valve housing. Use the thicker ones. I used the skinnier ones because they were the same size as the old ones I removed, but it still leaked after I screwed the bonnet nut on. I finally tried the thicker gasket (the thicker ones are connected to each other) and it sealed it right up. I believe the 1700 series cartridge is slightly shorter than the old 1500 cartridge and thus why the thicker gasket was needed. Second tip is the new shower head might not fit on your old neck. Mine didn't and I wasn't in the mood to change that out just yet, so I have chrome handle and back plate with the brass/gold shower head and tub spout. I have both pieces, but I'll save that for another day. Right now the shower is back to working with full pressure hot and cold. Now I just need to replace the water heater elements and I'm back.

If you have a 1500 series faucet and want to upgrade to the 1700 series. All you really need is a 1700 series cartridge and a 1700 series handle assembly. If you can find the handle assembly separate locally or on CL or something you can make the conversion much cheaper possibly. I ordered the conversion kit from Amazon + the chrome tub spout with pull down shower activator for $128 shipped, 2 day Amazon prime. Not too bad. Hope this helps someone down the road.

Sorry for the lack of pictures. I was fighting this thing in low light and no help. The instructions that came with the kit didn't help much.

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but that doesn't relate to the handle assembly.

What makes you think that ?

As you stated, On the front of the handle is plastic cover with the red and blue indicators, you should be able to pry it off with a thin screw driver or something similar.

That should give you access to the screw that holds the handle on.

If that is the case then place a cloth over the drain opening ( so you do not drop the screw down the drain ) and remove the cover and then the screw holding the handle on, the handle should put straight off. It may be a little tight so wiggling it back and forth while pulling may be required.

Unlikely but: It may be that handle is held on by the outer knurled cap, remove the screw and you pull or unscrew the outer knurled cap, then you can pull the body of the handle off.

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Deltafaucet
deltafaucet.ca › shower-cartridges
Shower Cartridge Identifier
We cannot provide a description for this page right now
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Reddit
reddit.com › r/plumbing › any trick to remove this delta shower cartridge? it has a slow leak. trying to remove and id the part number for replacement. tried pulling it out by hand but no workie.
r/Plumbing on Reddit: Any trick to remove this Delta shower cartridge? It has a slow leak. Trying to remove and ID the part number for replacement. Tried pulling it out by hand but no workie.
September 23, 2021 - Used this tool and it made the whole process so much easier. Cartridge popped right out. ... Back wrench it, they can twist. ... You're probably going to destroy it as you pull. It out. Worked on one of these a while ago and it was a nightmare. Delta really sucks to work on.
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Plbg.com
plbg.com › forum › read.php
Delta Monitor (1400?) - Can't get cartridge out
Ask your do it yourself plumbing questions and get free answers as well as DIY information about faucets, toilets, pumps and water filters from plumbers at Plbg.com
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Danco
danco.com › home › shop › repair parts › faucet repair parts › cartridges › replacement cartridge for delta monitor single-lever faucets
Replacement Cartridge for Delta Monitor Single-Lever Faucets - Danco
June 6, 2025 - The easiest way to remove the old Cartridge is to use a Cartridge Puller. Make sure to follow the instructions for the Cartridge Puller, which can be purchased at your local home improvement store.
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Reddit
reddit.com › r/askaplumber › delta bathtub faucet cartridge stuck
r/askaplumber on Reddit: Delta bathtub faucet cartridge stuck
January 28, 2024 -

Had a slow drip out of my Delta bathtub faucet that continued to get worse. Decided to change the cartridge on my own. Got through the process up to the point of pulling out the old cartridge. Ring was moved successfully. Long story short, this thing won’t budge. It’s really stuck in there. Moved it side to side up and down while pulling and used a flathead on it. No luck. Eventually the top half came off but the bottom is still stuck. Contacted delta and was told to try turning the water on the force it out, did not work. Even tried putting a screw in it and using a board and hammer to attempt to pry it out. Anyway any advice would be appreciated, about to give in and call a plumber for what I thought would be an easy fix.

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Deltafaucet
media.deltafaucet.com › MandI › 48027RevB.pdf pdf
Deltafaucet
4. Remove and throw away the black retention plug (not illustrated), on 1300/1400 cartridge only, from the brass stem. 5. See the reverse side for rotational limit stop adjustment. ... 7. FLUSH YOUR SYSTEM. Turn on water supplies. Check for leaks and let supply lines flush for one minute without ...
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Lawrence Journal-World
www2.ljworld.com › news › 2014 › aug › 27 › fix-it-chick-replace-delta-monitor-shower-cartridg
Fix-It Chick: Replace a Delta Monitor shower cartridge | News, Sports, Jobs - Lawrence Journal-World: news, information, headlines and events in Lawrence, Kansas
August 27, 2014 - Wrap the bonnet nut with a soft cloth to protect the nut’s finish before using an adjustable wrench to loosen it. Step 5: Remove the Delta Monitor cartridge by pulling it straight out from the wall.
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Reddit
reddit.com › r/plumbing › delta monitor shower cartridge replacement
r/Plumbing on Reddit: Delta monitor shower cartridge replacement
June 21, 2025 -

I have watch hours and hours of YouTube. Looks easy enough. Famous last words.

Please tell me what I’m doing wrong or need to do. I turned off the household water. Took the plastic caps off. According to the videos, then the handle sleeve should just pull off. No. It does not. I’ve pulled, pried, soaked in PB blaster, had my 18 year old weightlifter son pull on the handle sleeve. It is not moving.

I then tried loosening the inner ring, which also doesn’t move.

Please tell me how to take this thing apart.

Thank you.

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JustAnswer
justanswer.com › plumbing › fzvsb-trying-remove-delta-cartridge-older-faucet.html
Expert Tips for Removing Older Delta Shower Faucet Cartridges | JustAnswer Plumbing
... 1700 series cartridges often stick due to mineral buildup and difficulty disengaging the retaining clip. To remove the Delta 1700 series cartridge, first ensure the handle and black temperature adjustment ring are removed.
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Plumbing Forums
plumbingforums.com › general plumbing discussion › showers & tubs
Delta shower cartridge replacement | Plumbing Forums - Professional & DIY Plumbing Forum
May 20, 2021 - $21.99 $29.99 RP19804 Shower Cartridge Compatible with Delta 1300/1400 Series Single Handle Tub Bathtub Shower Faucet Replacement for Delta Monitor Cartridge Repair Plumbing Parts, RP22734 Bonnet Nut (1993-2007) Sxtrrdnary
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Amazon
amazon.ca › Delta-Shower-Monitor-Parts › s
Amazon.ca: Delta Shower Monitor Parts
Check each product page for other buying options. Price and other details may vary based on product size and colour · Pressure Balance Cartridge Replacement Compatible with Delta Monitor Tub and Shower Valves – 13/14 series (RP46074) · Faucet T17038 Lahara 17 Series Dual-Function Shower ...
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Deltafaucet
deltafaucet.ca › single-handle-cartridges
Deltafaucet
We cannot provide a description for this page right now
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Rooter Guard
rooterguard.com › home › uncategorized › how to fix a delta monitor shower faucet
How To Fix A Delta Monitor Shower Faucet | Rooter Guard®®
April 18, 2025 - With the channel-lock pliers, slide off the bonnet or trim sleeve when you can’t remove it smoothly due to accumulation of sediments. Make sure that the stop cap is put back in the same position. Drag the cartridge backwards and remove it from the Delta Monitor shower faucet head.
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DoItYourself.com
doityourself.com › doityourself.com community forums › plumbing, piping, water heating, wells, air & water filtration and conditioning › toilets, sinks, showers, dishwashers, tubs and garbage disposals › delta monitor shower cartridge replacement help
Delta Monitor shower cartridge replacement help - DoItYourself.com Community Forums
May 4, 2011 - The only ID I can find on the face plate says Delta Monitor. I don't know which # model it is. Thanks in advance. Last edited by Mrs. A; 05-03-11 at 10:41 PM. ... Find all posts by Mrs. A ... Order both cartridges. Spray the rusted with PB Blaster or CRC, not WD40. I don't know how that stuff became so popular. Also put a drop of transmission fluid on it. ... Repair a Single Handle Tub and Shower Cartridge Faucet By Sage C.
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Reddit
reddit.com › r/howto › i need to replace the faucet cartridge? does anyone know which one i need to get, or how i can figure out which one to get?
r/howto on Reddit: I need to replace the faucet cartridge? Does anyone know which one I need to get, or how I can figure out which one to get?
December 11, 2024 - I need to replace the faucet cartridge. Does anyone know which one I need to get, or how I can figure out which one to get? ... How can I remove this recessed faucet aerator— HAVE TRIED EVERYTHING! Aerator keys, needle nose pliers, CLR, lime away, boiling water, overnight soak ... Delta Series 1400 Shower tub spout dips water again, when the valve is off, 3 weeks after replacing Cartridge Assembly (RP19804).