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Aquamaster Drive End Cap Assembly 54520 for AMS 700, 900 or 950 | Water eStore

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Aquamaster Drive End Cap Assembly 54520 Replacement for AMS 700, 900 or 950. Will also fit Water Boss water softeners.

✔️ An easy fix for your water softener when it needs to have the drive end cap assembly replaced. Click the "How to Install" image above to see a video on how to replace the drive end cap assembly on your Aquamaster or WaterBoss water softener. If the trouble shooting indicates the drive end cap assembly is the cause, order it here.  Easy to replace, see the link to the manual below and video above.


PRT 54520

All products include FREE standard shipping in Canada!

File Downloads

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Customer Reviews

Based on 74 reviews
Israel S. (Carlisle, US)

WaterBoss Replacement Drive End Cap Assembly 54520 | Free Ship

Hi Israel, Thank you for your business!
We look forward to helping you again soon.
Take care and stay safe.


The item is not exactly the same the original. There are some minor differences and I am pretty certain that was the reason I ended up with a persistent leak. It's minor but beats the point as that was the main reason I was replacing the original.

Dennis H. (Princeton, US)
No issues

Back up and softening

Thank you, Dennis, for your review! We're glad to hear that you had no issues with your WaterBoss Replacement Drive End Cap Assembly and that it's working to soften your water. If you ever need any assistance, please don't hesitate to reach out to us. Happy softening!

Felicia B. (Canton, US)

I was notified trough out the process and sent updates which was very helpful. Will be doing business again if the need arises!! Thank you

Thank you, Felicia, for your business, and kind words!
We look forward to helping you again soon.
Take care and stay safe.

Chris W. (Crookston, US)

Fit perfectly

Thank you, Chris, for your feedback! We're glad to hear that the WaterBoss Replacement Drive End Cap Assembly 54520 was a perfect fit for your needs.
We strive to provide high-quality products for our customers.
Have a great day!

About Aquamaster

AquaMaster is a Canadian company that specializes in providing water treatment solutions for residential, commercial, and industrial applications. The company's mission is to provide high-quality and reliable water treatment systems to its customers.

AquaMaster’s mission is to provide high efficiency certified water appliances at affordable prices while focussed on honesty, integrity, and service to their customers’ satisfaction.*  Based in Calgary, AquaMaster  is a trademark of ACi  Distributing Inc. which was incorporated in 1999 and have distributors throughout Canada.   They have numerous industry certifications and an A+ rating with the Better Business Bureau. 

AquaMaster’s AMS700, AMS900 and AMS950 are premium high efficiency water softeners that are renowned for how little water and salt they use during regeneration.

 We offer YouTube videos that support AquaMaster Water Softeners and Drinking Water systems explaining how they work, how to install and service. We vet our suppliers and personally test all AquaMaster products, installing them in our homes and monitoring their performance daily. They have a proven track record of not only building environmentally friendly and affordable products but also providing after-sales support and service. 

Water eStore carries AquaMaster home water appliances that are water softeners and drinking water systems.  They offer a 5/10-year warranty and toll-free client support.  We offer a 100% money back guarantee if you’re not satisfied with your investment in AquaMaster water filtration products for your family. 


See all from Aquamaster

Shipping Policy

We offer FREE Shipping anywhere in Canada. Once your order is placed, we process it the next business day and ship via ground transportation. In very remote locations, whenever the shipping costs become prohibitive we reserve the right to either cancel the order or ask that you contribute to the shipping costs, it's up to you. Your items may take anywhere from a few days up to a few weeks to arrive.

If you have any special shipping requirements, like requiring a signature at time of delivery, please leave a message in the "Special instructions for seller" section while checking out. If you order multiple products they may not all arrive at the same time as we ship from multiple warehouses and each item will be shipped directly to you. If no one is home when your order is delivered it will be left for you but we cannot assume responsibility for your order once it has been dropped off.

If you have any questions please contact us at

Thank you for your order, we appreciate your business!


Excluded Items

We do not offer refunds or returns on items built to order including Aclarus Ozone systems, Reverse Osmosis systems larger than 500 gpd or water softeners/iron filters over 1 cubic foot. 


Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately, we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.

To complete your return, we require a receipt or proof of purchase.

Please do not send your purchase back to the manufacturer.


Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within a certain amount of days.

Late or missing refunds

  • If you haven’t received a refund yet, first check your bank account again.
  • Then contact your credit card company, it may take some time before your refund is officially posted.
  • Next contact your bank. There is often some processing time before a refund is posted.
  • If you’ve done all of this and you still have not received your refund yet, please contact us at

Sale items

Only regular priced items may be refunded, unfortunately, sale items cannot be refunded.


We only replace items if they are defective or damaged. If you need to exchange it for the same item, send us an email at and send your item to: The Water Store 1004 King Street Midland Ontario CA L4R0B8.


To return your product, you should mail your product to:

The Water Store
1004 King Street
Midland Ontario CA L4R0B8

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Depending on where you live, the time it may take for your exchanged product to reach you, may vary.

If you are shipping an item over $75, you should consider using a trackable shipping service or purchasing shipping insurance. We don’t guarantee that we will receive your returned item.

Still Got Questions?

Not to worry, we're here to help. Let us know what questions you have about Aquamaster Drive End Cap Assembly 54520 for AMS 700, 900 or 950 | Water eStore and one of our experts will get back to you shortly.