"Is it necessary to bolt the pump down? Do I need to install an anti-vibration mounting system?"
The installation instructions (comes with the pump) state: "Mount motor base to a secure, immobile foundation." Our founder has had a Sequence pump in operation for a number of years without his pump being secure. He simply has it sitting on a few blocks. Make sure to have the body grounded properly. You absolutely do not need to use any anti-vibration products. This pump is the best, and we have never seen or heard of any Sequence pump that creates vibration. It has a commercial rated top quality motor.

"What does shut off at 21' mean?"
It means that the pump cannot pump higher (measured vertically) than 20' 11" (with no friction loss taken into account). If you need a pump to pump higher than 19', we probably would recommend that you purchase a different pump.

"Can I restrict the flow of the pump if it produces more flow than I'd like?"
Yes. You must restrict the outlet side (the discharge side) of the pump. Do not restrict the input side.

"Can the Sequence pump stand out in the rain and elements?"
Cover the pump and motor unit with a suitable shelter. When protected from rain and dust the motor will last much longer. The covering should still allow the unit to have suitable air recirculation for proper cooling.

"Have you had any complaints about the Sequence pumps?"
We must admit that until we started emphasizing that you need a lot of water for the inlet, we had a few complaints that the Sequence pump wasn't producing the volume that the manufacturer claims. Once we tell the customer to read what we are writing here...that is...have a good source of inlet water...we get replies with 'thanks, that fixed it.' Sequence pumps deliver an amazing volume of water for the horsepower rating, but you need to have adequate piping to the pump. By using a larger size pipe, you will generally get a lot more water being pumped.

"In my design of how and where I am going to install my new Sequence pump, is there anything else that I should know or think about?"
Besides making sure the pump always has plenty of water to it, it is a good idea to make sure that in your design/plans/installation that the impeller cannot travel in reverse. This can happen when the water, in a long length of pipe (uphill, after the pump), stops being pumped (as when the pump is turned off), and then is able to travel backwards. This creates a reversal of flow through the pump and could damage it. To prevent this, we recommend that you install a swing check valve in-line.

"Do you recommend rigid or flexible couplings between the pump and piping?"
PVC fittings must be used to thread into the pump. What type of couplings or fittings after that is up to you and not that important. We do like flexible schedule 40 PVC (aka "spa flex") for piping to and from the pump. You can smoothly bend around almost anything with it, and it is very durable. But almost any quality piping product (PVC etc.) will work.

"Ok, I'm convinced that the Sequence brand is a top-quality pump. Why should I buy it from you folks?"
Because we sell so many other products, our reputation is impeccable, and because we sell to so many places, you can be assured that we will be here tomorrow. The Sequence pumps are a great example of value over price. You will save in the long run. If you live out of California we do not need to charge you sales tax.

"You write that the Sequence pump is quiet. Can I hear it run?"
By "quiet" we mean relative to pumps of these sizes. All pumps of this size produce noise and Sequence does also. Consider that even the smallest of these can pump a LOT of water and that means sounds will be heard. Making sure there are no restrictions and that there is plenty of water source without air in the lines will make the pump run a lot quieter. For a pump that can produce as much as these do, the Sequence pumps are "relatively" quiet. Of course top quality submersible pumps will produce less sound when running because they are under the water, which will absorb much of the sound of the motor running.

"Do the Sequence pumps have drain plugs so that I can drain it in the winter?"
Yes. At the bottom is a non-tapered drain plug that you can unscrew and the water will empty out of the pump. Note that an o-ring makes the seal; please do not put PTFE tape, pipe dope, or anything else on it. It seals very well with the o-ring provided.

"I need to add a pond skimmer to my pond. The skimmer may suck a small amount of air since it floats on the surface. Is this ok?"
Air must not (meaning "never") enter into the intake (inlet) of a Sequence pump at all.

"Any other reason to buy a Sequence pump?"
Every Sequence pump is run and tested after the manufacturing process. We are not aware of any pump (costing less than $2,000.) manufacturer that does this. This is just one example of why the initial investment is more than a "cheap" pump. With Sequence you get your money's worth and then some. You will save a lot of money in the long run on energy bills compared to energy-wasting pond pumps. If you want the best, Sequence is for you.