Iwaki 100 refurbish?

[hkgar]

I have an Iwaki 100 for my return pump. When I first installed it I had to install a gate valve on my return from sump line as the drain from DT could not handle the flow. Eventually I have gotten to running with the gate valve fully open and the flow rate was about 610 GPH. I have 8 feet of lift, 15 feet of horizontal, 19 90 degree elbows, 4 45 degree elbows.

I just removed the gate valve and installed a check valve and the flow is now less than 500.

What is the life expectancy of this pump and can I refurbish it. or maybe take it apart and clean everything?

 

[billdogg]

You can almost certainly get replacements for any parts that have worn out. It is also a very easy pump to take apart to clean. If you haven't be prepared to be amazed at the amount of gunk built up in the plumbing. It may be easiest to just replace the plumbing itself. And lose the check valve. It is unneeded and destined to fail anyway. And it will fail. Probably about 10 minutes after you leave for a 2 week vacation. If you need a gate valve to temper the flow, use one. Nothing wrong with them and many of us (most?) have one on the return to the DT.

 

[Vinny Kreyling]

Agree with Bill on this one.
I ran an Iwaki 70 for years, bought used.
Cleaning is a breeze & parts are available if needed.

 

[hkgar]

I took mine down today and took it apart. Cleaned everything, there was a lot of gunk and a couple of the impeller areas were clogged. Now back together and the flow per Apex Flow monitor is 257?

 

[hkgar]

Here is flow 2 months ago

 

[Vinny Kreyling]

Were you able to check any of the plumbing?

 

[slief]

I took mine down today and took it apart. Cleaned everything, there was a lot of gunk and a couple of the impeller areas were clogged. Now back together and the flow per Apex Flow monitor is 257?

Did you clean the flow sensor as well? Those sensors need to be taken apart and cleaned somewhat regularly. If you don't, not only will they report inaccurate numbers but they will also restrict the flow as the paddle won't turn freely.

 

[hkgar]

I did clean the flow monitor today. Cleaning them (2) is part of my routine maintenance.

Current flow show 279

I have determied that the pump is a bit over 10 years old and has about 90,000 continuous hours of operation.

 

[hkgar]

Also just check the watts draw and it was 275. The pump specs are 380 watts.