VCMA-20ULS 115-Volt Condensate Removal Pump

No, not exactly. This is a model VCMA20ULS and the product you are referencing the 554421 is a VCMA20UL. So they differ in that this one has an S in the model number. The S stands for safety switch. A safety switch is an unpowered high water switch built into the pump. It is unpowered so you don’t have to use it. You can just leave the wires hanging. I carry this version, with the safety switch on my truck. When I am working with a piece of equipment designed and built to work with a safety switch I sometimes use it. And when I am working on piece of equipment that does not have this feature I leave the witch wires unconnected. What does it do? Some appliances have an option built into their control strategy that allow you to tie the pump into it. That way if the pump breaks and the water level gets too high, the safety switch can shut the appliance off before the pump chamber overflows.

The simple answer is yes. The 554436 model number indicated that the pump came supplied with drain tubing in the box. . The 554425 is a pump only. Since i assume you already have the drain tubing installed and we are only talking about replacing the pump, the 554425 will be a good replacement.

Just connect the hose and plug it in.

I am modifying my answer because Little Giant called me back since I responded the first time. According to the factory technician they have never made a pump identified as a “VCMA20OULS”. If we assume this is a typo and what you have is a VCMA20ULS than I can say that model Home Depot offers as there SKU 204481225. If you put that number in the search box it will come up. It should be dimensionally identical to the one you have currently have.

Sorry I am not in a postion to give you an answer. These questions are not routed to The Home Depot associates but to the supplier of the product. If you have a quesion about this product you can call me at 978 651 3301 chris

If you scroll down the Home Depot product listing page you will find a section labeled “Info and Guides”. There you will find PDF’s of many of the product documents. If you open the one entitled “Use and Care Manual” it contains a parts breakdown. The part you are asking about carries part number 154715 and is available on line.

I would say yes. Inlet and outlet holes are pretty wide and need not be tight sealed.

Without being on the job site and looking at the mini split in question, it’s hard for me say if this is the best condensate pump to use. However, you have not said anything that would lead me to believe this pump is disqualified. You want to make sure the condensate can get from the air handler into the pump and that the pump has the power to lift the desired height needed.

Yes, this pump runs intermittently to remove condensation from a/c systems and recondensing heating systems. There is plenty of capacity to handle either, since they don't normally run simultaneously. I've used them for years with no problems.

Sorry, not sure. Maybe Google it or ask a plumber.

I have been using it for a while, now. Except for the noise it works well for draining the icemaker.

water go in and get pumps to where ever you run line, should work, not that noise either

I am sorry but I am not sure I fully understand the specifics of your question. I can tell you I have seen and personally utilized this pump to handle an ice maker. And I have used it to remove condensate from other appliances. But I can not tell you if it is the best choice for you specific application as I lack specific job site knowledge. To select a pump, you would need to know two things. First how much water the ice maker produces. This will be in gallons per hour or gallons per minute. Second how high vertically you need to lift the water. We call this height the head. Then I would look at the pump curve. This is a graph that displays pump performance. On one axis you have height and the other flow rate. The graph or curve illustrates pump performance at all points within the pumps performance range. If you scroll down the Home Depot product listing page you will find a section labeled "Info and Guides". There you will find a PDF of the specification sheet. The pump curve is on the second page. It shows, for example, that if this job requires the water be lifted a total of ten vertical feet it will move 50 gallons per hour. More if the height is less and less if the height is more. As a general rule it is a best practice to select a pump where your need falls in the center of the performance curve.

I do not know how you would use the on an ice maker. The ice maker would have to drain into the pump housing. This pump cannot draw water from the ice maker. I do not believe you can use this under a sink. I do not expect this pump can keep up with the volume of water that would come from a typical faucet or tap.

I would think so. I will add some to mine this week. I will let sit for a while. 

Yes you may

I do and I have had good results in gettering rid of the algae build up. But I would make two cautionary statements. First take into account where the pump discharge goes. You want to make sure there is nothing on that end the that will be harmed by the bleach. Second, bleach is very powerful and the pumps reservoir is not very big, do you do not need to use a lot. My concern is that to strong of a bleach solution could harm the discharge hose.

Yes

All the AC guys I have discussed this with say that vinegar is better than bleach and doesn't degrade the pump assembly.

I’m not sure if bleach would degrade the plastic. I use a little dish detergent and water mix then use a scrub brush to clean out the well and float