Simer 2305-04 Geyser II 1/4 HP Submersible Utility Pump , Black

I purchased this pump for use in my home construction area that is prone to flooding.Description:I won't rewrite the manufacturers description, but would like to note the very durable impact resistant case, and the highly stable, upright position of the pump due to the wide base and low center of gravity.Put to the Test:I've used this pump outdoors on more than twenty occasions, twice having continuous pumping for over 36 hours. My home expansion construction site floods during heavy rain from soil and roof runoff, and every time I have successfully removed about 99% the water with the Geyser II. Sometimes the water was quite full of silt and plant debris, but the pump never stopped working. (I took another reviewer's suggestion to drill holes in a plastic 5 gallon bucket. This worked nicely to limit leaf debris from clogging the pump base.)Specification:Curious about the 1260 GPH spec, and also interested in calculating how much water I had pumped, I performed a calibration of the pump under typical conditions at my site. I placed the pump in the aforementioned hole riddled bucket with the pump base submerged approximately 16 inches. I had 2 x 50' lengths of 3/4 hose connected to the outlet with approximately 3 1/2 feet of rise from the pump base to the hose outlet. The pump was connected to power with a 12 gauge 25' outdoor extension cord. I also did a quick calibration of the bucket to confirm 5 gallons to be very near the top of the bucket. I timed 5 gallons fill 3 times, with an average of 46 seconds. This calculates to 9.6 secs/gallon or 375 GPH. This is substantially less than the advertised pump rate, so keep in mind 2 factors that will affect your results: water head height and pipe back pressure. So to improve your pump performance, if possible, decrease the height the water is pumped and decrease the pipe back pressure by shortening the length of effluent hose or by increasing its diameter. By my calibration, I can roughly calculate the Geyser II pumped 13,500 gallons in the 36 hour stretch. Quite impressive I think.Important note:I've read other reviewers describe running the pump dry for extended period. When I did this, perhaps for an hour or so after the pump evacuated all the water from the site, I noticed the cord and plug got quite hot. I'm not sure if the cord is underrated for the amount of current when pumping dry, but I suggest users pay attention to this if they pump dry.Conclusion:I am very pleased with this pump's performance, despite my conditions not resulting in the advertised pump rate. I think the manufacture must have used the most ideal conditions to arrive at the 1260 GPH rate; perhaps measured with NO effluent hose, and pump submerged to the level of outlet. But, in my opinion, that is not really a realistic operating condition.Cheers!

I needed to pump out a 20'x20'x7' deep pit filled to the top with rain water and with the usual muck (mud and leaves) at the bottom.I took the pump out of the box, attached the included garden hose adapter (you just manually screw in on); attached a 25' garden hose; connected a long 3-prong extension cord; and lowered the pump to the bottom of the pit. It took a few seconds to "charge" (fill with water), then produced an output like you'd get with a faucet on full-blast. It ran for 20 hours continuously and emptied the pit down to the last few 10s of gallons before I unplugged the extension cord from the garage outlet.Now I could see that the pump had landed on its side on the mucky bottom, but (luckily?) with the "anti-airlock hole" facing up. I say "luckily?" because the power of the water going through this narrow anti-airlock hole is probably enough to have excavated an adequate hole in the mud if the pump had landed anti-airlock-hole-side down. Next time I'll try to use a bucket with holes punched in it to help shield the pump better from muck and other detritus, but this time it worked fine lying unprotected, on its side, on the muddy bottom.I also tried it on a ~1/2" deep puddle in my garage. Initially, it just sat there sputtering loudly via the anti-airlock hole but not moving any water through the hose. So, for you newbies (like me): If you're trying to suck up very shallow pools of water, you have to "charge" the pump first by submerging it in deep-enough water (I used a 5 gallon bucket of tap water) to get the water flowing out the top where the hose is connected. Then, as long as you move the working pump fast enough from the bucket to the floor, it will continue to pump water until it gets down to the 1/8th inch depth of water limit. Another reviewer had a great tip for shallow (ie <1/8th inch) water when he recommended using your wet/dry vac as a sump to collect this water, then submerging this pump into the filled-up wet/dry vac to empty.And finally, a mighty shout out for Amazon's wonderful customer service: My first order was sent Parcel Post (Amazon's free shipping over $25 option) on 12/15, estimated to arrive 12/22. USPS tracking alleged that it was delivered on 12/18, but it definitely was NOT - someone was here all day. (It never did arrive.)So, I used Amazon's on-line option to request a call-back to my landline phone within 5 minutes. Wonder of wonders, a competent human did, and she offered, without hesitation, to send me a replacement immediately via FREE next-day Fed-Ex. And that's exactly what happened.

I just used this pump to flush out my tankless water heater and it worked flawlessly. It maintained good pressure for the 45 minutes I ran it. It did start to heat up the vinegar quite a bit after that amount of time, but I don't think it was a problem. I would recommend this pump to anyone needing a utility pump for small jobs like this. I haven't tried to pump out a hot tub or anything else, so I can't say if it would be good for this purpose or not. I should mention I used the adapter and a laundry hose when flushing my tankless heater. The pump was situated about 3 - 4 feet below my tankless heater.Now this is the 2nd pump I received from Amazon. The first one came and was missing the adapter and appeared to be used. I immediately told Amazon about it and they shipped me a new one in 3 days, and sent me a postage paid return label so I could just drop the old one off at the post office. They also offered me a sincere apology. I had over a month to return the old one (before they would charge me for it). I thought the service I received by Amazon was excellent, and would highly recommend them for any product you wish to order.