Delta®
Soap / Lotion Dispenser - Pump Assembly
Model#:
RP21908
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PRODUCT FEATURES
Documents & Specs
Installation Information
Overall Height (in.) :
8-5/8
Valve Type:
NA
REVIEWS
Rated 1 out of
5
by
Anonymous from
stay away
I bought my faucet in 2010, and the soap dispenser is the same part number, but the current part top is too large for the dispenser top, and the stem is too short for the soap bottle. It does not seat properly in the body assembly.
Date published: 2026-06-12
Rated 1 out of
5
by
Texas Joe from
no soap
We have had our soap dispenser for 1 1/2 years, and it has almost quit dispensing soap located on our kitchen sink. We have to pump it several times to get enough soap to hand wash dishes in the sink. Now i have to purchase a new pump or change brands of Despensers.
Date published: 2026-03-28
Rated 1 out of
5
by
MikeI from
Soap dispenser replacement pump doesn’t fit
Unfortunately, this soap dispenser pump does not fit my dispenser. The diameter of the pump tube is too large for the base of my pump handle and the tube is about 2-3” too short.
Date published: 2026-01-13
Rated 1 out of
5
by
MikeI from
Shipment lost?
I would like to give y’all a 5 star rating but I have noy received the product?
Date published: 2026-01-11
Rated 1 out of
5
by
Scott from
Doesn’t fit
Doesn’t fit! Gotta buy the entire stinking thing now.
My old one is only 2 years old! B
Date published: 2025-11-08
Rated 2 out of
5
by
LH777 from
Don't last very long
I find that I have to replace the pump about every 2 years because they seize up and won't pump anymore. It's funny, I have cheap soap bottles with pumps that I refill and reuse for other things that are going strong after 15 years. Surely it could be made with parts that hold up longer?
Date published: 2025-02-04
Rated 1 out of
5
by
Longtime Homeowner from
Does Not Fit and Can't be Returned!
I purchased this to fit my Delta soap dispenser in this photo. It doesn't fit and due to their Return Policy that only allows you to return items that cost at least $15 it can't even be returned.
Date published: 2024-06-09
Rated 1 out of
5
by
none from
Poor service!
Doesn't fit my Despencer! I have had nothing but bad luck dealing with Delta on
line ordering. The parts never fit, and when I return them, I never get reimbursed.
Date published: 2022-10-28
Q&A
Will this pump work with dispenser rp37039
My soap dispenser is not really pumping the soap out anymore, will this one fit?
Hello Becki,
Thank you for your question on the Delta Soap / Lotion Dispenser Pump Head. I am so sorry for the inconveniences you have been faced with. Yes, this will work on soap dispenser model number rp37039. When was this purchased? Where? As long as you are still within the warranty I can replace the pump for you. If you could please reply to my email with your name, address, and telephone number I will do my best to rectify the situation for you.
Thanks,
Sarah
Consumer Care
Delta Faucet Company
Date published: 2017-09-09
Is this pump a replacement for use with RP50781 model soap dispenser?
Hello Fanny,
Thank you for your question regarding the Delta Soap / Lotion Dispenser Pump Head and I am happy to help you today.
The replacement part number for a replacement pump and bottle for soap dispenser model, RP50781, is RP47888.
If you could please respond back to this email with your first and last name, telephone number, home address, an approximate date of when you purchased and installed the model and a photo of the model, I will be happy to assist you with ordering a replacement pump for your dispenser.
I look forward to your response!
Thank you,
Brandy
Date published: 2024-03-28
What soap dispensers pump is needed for a RP50813RB
Hi, JimT!
Thank you for your question. The correct soap pump for the Delta RP50813RB Soap Dispenser is RP47888. Here is a link to this part:
https://www.deltafaucet.com/parts-product-detail?modelNumber=RP47888
Best Regards, Rosanna
Date published: 2024-03-28
what is the diameter on the top flange? I am looking for a replacement pump with a 1" diameter flange and roughly 3/8" thick. Thanks for your help!
Hello Costarob,
Thank you for your question regarding the Delta Soap / Lotion Dispenser - Pump Head and I am happy to assist you today.
The diameter of the top flange for this dispenser is 0.85".
Unfortunately, we are not familiar with a 1" flange and I apologize for any inconvenience this may cause.
Please feel free to give us a call if we can assist you with anything else going forward at 800-345-3358.
Thank you,
Brandy
Delta Faucet Company
Customer Service
Date published: 2024-03-28
How do I replace this? How does it attach to the head? Model #RP50781SS
Thank you for your question, MikNoyl! The RP50781SS Soap Dispenser uses the RP47888 Soap Pump rather than the RP21908.
https://www.deltafaucet.com/parts-product-detail?modelNumber=RP47888
To install the pump, lift up on the head assembly and pump to remove them from the base. You can then pull the pump off of the head assembly and press the new one into place.
Best regards, Jon
Date published: 2024-03-28
Does the pump RP21908 work with dispenser RP50781?
Pump only dispenses minimum amount of soap per pump.
Hi Chris, Thank you for your question!
The RP21908 will not work for the RP50781 soap dispenser. The correct pump you need is RP47888.
Best regards,
Brandis
Date published: 2024-03-28
I need to replace the pump for a Debonair MODEL#: 16927-SD-DST soap dispenser. This pump has a threaded male end that screws into the spout. Which pump fits this model? Thanks.
Thank you for your question, SVeb! Model 16927-SD-DST includes the RP44651 Soap Dispenser Assembly. This uses the RP47888 bottle and pump.
https://media.deltafaucet.com/PartsDiagram/DPD-K-16927-SD-DST.pdf
Best regards, Edward
Date published: 2024-03-28
Where can I find the model number of my soap dispenser?
Hi, Bob!
Thank you for your question. The model number will not be located on the soap dispenser. We recommend to look through our soap dispensers on here to find your soap dispenser. Here is a link to the soap dispensers, including discontinued models:
https://www.deltafaucet.com/kitchen/accessories/soap-dispensers
Best Regards,
Rosanna
Date published: 2017-01-30
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