Q:We usually wait 4 - 5 minutes for hot water in our master bath. I've been looking into ricirculation pump systems. This would have to be a retro-fit system since some of the lines run through concrete slab making adding a return loop on the line non-feasible. I have found some people comment on simply using a by-pass valve system without a pump (ie. Hot Water Lobster). We do have hard water which I've also read that can present a problem with pumps dieing quite quickly. While I'd like it, I don't need 1 second hot water, but I can't stand wasting gallons waiting for 4-5 minutes. A reasonable 15-30 second wait would be a huge improvement. Has anyone had reasonable success with the bypass valve without the pump or should I plan on getting the pump too? Thanks in advance!

A by-pass without a pump is going to do nothing. The pump moves the water from the heater to your sink. They do have the under counter heaters, but you need to have them plumbed for gas or have electrical run to them.

Q:When replacing the water pump in a 2007 Dodge Grand Caravan. Old one is loose, I'm about to lower the engine a little to get the water pump out. Before putting the new one on, do I have to do anything with the timing belt/chain?

Depends on the engine size . If the pump is driven by the timing belt then yes , if the pump is driven by the serpentine belt then no .

Q:How do you remove the water pump from bmw m42 engine?

Remove fan from pulley (usually using a big special open end wrench) turning clockwise with you in front of the car/engine. Loosen bolts holding pulley to water pump (but do not remove bolts and pulley yet). Adjust fan belt tensioner to remove alternator belt (there is a plastic cover in the middle of the tensioner pulley under which is a bolt usually torx 50 with which you can adjust the pulley pulling clockwise/to the right). Proceed to remove bolts and pulley from water pump. Remove bolts from water pump. Put 2 screws into the empty/previously unused holes in the sides of the water pump to pull it out. Remove and replace water pump. Refill with coolant. Bleed cooling system to remove air from the system.

Q:How do I check my well water pumping system to see if there is a leak? I have terrible rusty water.

the only way to check it is to have a well pump service pull the pump and check the verticle lines. they tend to rust out. you can have them replaced by pvc lines now. when our pump went out we had all of the lines replaced because several of the galvanized lines had pin holes in them

Q:water pump pulley has slight wobble in it. not seeing water yet....is bearing going bad

Could be several things. The pulley is not on straight. The pulley itself is not truly flat when made but still within tolerances allowed by manufacturer. .Has nothing to do with the bushing(bearing) They generally wear out over time and start leaking coolant out.

Q:Pump impeller diameter plus assembly what changes? What's the effect on the motor?

1., the larger the diameter of the impeller, the greater the head, the greater the flow rate, because the flow of water depends on the speed of rotation of the impeller generated by the centrifugal force and the line speed on the tangent, the greater the diameter, the centrifugal force and the greater the speed of the line. The relationship between the centrifugal pump water delivery and the vacuum degree is that the centrifugal pump is the centrifugal force principle to complete pumping. Without water, the time and space turn will burn out the equipment.2., the head and impeller diameter is related, the larger the impeller, the greater the head, and vice versa. The flow rate has little to do with the impeller diameter. Under the rated conditions, the greater the head, the smaller the flow rate, inversely proportional.

Q:I was vacuuming up water from my basement I assumed was from the rain, suddenly water started spraying out of a blue pump at the base of my furnace, don't know what the pump does or why its spraying but its making an awful mess.

Furnace Water Pump

Q:Variable flow variable frequency water pump how to adjust the flow?

Variable frequency pump is mainly depending on the frequency converter to adjust the speed of the pump motor, thereby regulating the flow and lift pump, the following Q1/Q2=n1/n2; H1/H2= (n1/n2) -, the frequency range of the frequency converter in 30HZ~50HZ

Q:I Have a 1982 Suzuki DT8 Outboard motor, i rebuilt the water pup, new impeller, wear plate, all that. This is the first time iv run it in a barrel, it wont pump water now. But here is the thing, when i take the inspection cover off(the little round cover that lets you acces the shift linkage), and i run the motor, it will pump water. i noticed that wile i have that cover off all the exhaust comes out that hole and not out the bottom, is the exhaust getting sucked in the pump and stopping it from circulating water?

i agree with richard. get a hose attachment, a set of earmuffs and run it with them. you wont be able to see water exiting the prop shaft area with the motor in a bucket. hte indicator, where the motor normally pisses to show its pumping water, those sometimes get clogged and need cleared out. it is possilbe for the motor to suck air, or exhuast, instead of water, if a gasket is bad around the impeller. in addition to the gaskets normally changed, there are more gaskets underneath that. usually, those gaskets only go bad if the motor is overheated to the point that the old impeller housing shows signs of excessively high temps. if the old housing was half metled, id go ahead and pull it apart and change the other gaskets too. but the exhuast chooses to exit that port becuase its easier to go out there then through the water. and you see water exit with it, so you know it is pumping water up into the motor. i'll also point out this much. if you are unsure, take it to a proffessional. you can total your motor by operating it without a properly working cooling system. paying a pro to fix it right is much cheaper then a new motor.

Q:what could cause a impeller on a water pump to be completly shredded up i just had to change mine in my toyota camry and was wondering if i could do anything to prevent this from happening again?

I'm guessing it had a plastic impeller. Sometimes there are updated pumps with metal impellers.