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How do you use the main drain when the water is below the return valves?


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Answered 2015-07-16 18:15:14

Main drain sucks from bottom-as long as its under water its ok to run and have the returns just shoot water down into shallow pool.


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The key word is "drain", meaning it works by gravity, so a drain value should be at the lowest point in the system. Typically there is one just past the meter. If a lawn irrigation system is a branch of the main system it should have its' own drain valve for winterizing it. You can purchase stop valves (or shutoff valves) with built-in drain or bleeder valves.

Drain valves are not designed to mist. They are designed to evacuate liquid that is still in the line after the water is turned off. A manufacturer in Arizona (AmFog Nozzle Technologies) has information on their website for drain valves and misting nozzles; their YouTube videos also explain how the drain valves and misting nozzles work.

there are valves on bilge pumps so that if there are traces of oil in the bilge water, the valves will close so that the oily water will not be discharged overboard. The valves are required to be screw down non-return valved

It should not have water in it, especially if freezing weather is expected. Drain the pool to below skimmer line and drain the filter and filtration equipment.

Not unless the drain and or tub is full of water and you have no heat on or it gets below freezing in the house.

Is this a sand filter? How many valves control the flow of water? It appears the b/w valve is defective.

A "return drain" in reality would be called a return fitting . It's the one where the filterer, heated water goes back to the pool thus RETURN. Main Drain is that grate looking device at the deep end of the pool on the bottom where water is sucked from the pool and sent to the pump - the part of the equipment with the motor and clear lid. The filter - sometimes wrongly referred to as the pump - is the large round or vertically rectangular shaped tank. You need both. k

No. You cannot use the main drain to lower the water level below the skimmer. This is because the main drain is not really a drain. It only connects right back to the 3 port valve in the skimmer.

Your question seems too easy as it is a basic requirement of pool cleaning. However: Attach your vacuum head to your side outlet (unscrew the cover in the side of the pool) using a floating hose. turn off the valves to the bottom drain and the skimmers, leave the pump setting on filtration, fill the hose with water and turn on the pump. After vacuuming the bottom of the pool, switch off pump and return valves to previous setting. be sure to backwash the filter after cleaning if required.

there are not water valves on every horn. usually it is attached to the leadpipe on the back of the horn near the bottom. its right below (attached to but below) the open f side's valve

syphon to a drain that is below the height of the base of the tank

when your water level is about 6 inches below the item. when your water level is about 6 inches below the item.

The most likely cause of this is simply that the drain hose or the drain it goes into has become kinked, or clogged with schmootz, (the lint and stuff carried in the drain water). Try cleaning both, the drain preferrably with a snake.

The drain pipe should have a vent that goes up where the sink drain goes into it. That is where it vents. Sinks drain because there is nothing causing a vacuum when the water leaves the sink.

Since you will be draining some of the water first there is no pressure to worry about. Shut off the water supply (for a shower, it usually means you need to shut off the water at the meter) and open the shower valves (hot & cold, if applicable) then find a sink, toilet or outdoor water faucet at some level below the height of the items you are to replace. You don't have to open them for long... a few seconds will do. This allows air to enter the shower valves and pipes and will drain to a point so that dripping water will not be a problem.

I have been taught to drain the tanks at the end of every day so as to help prevent water and or oil from compressor getting into the complex valves that trucks rely on these days. Oil mixed with the condensation becomes a thick sludge and can gum valves completely over time or slow the normal operation of the valves down. Gear changes or brake systems rely on good efficient operation of many air valves specially late model trucks.

I'm not sure what you mean. A drain pan protects the area below the water heater from ruin if the water heater begins to leak. You can prevent major damage by putting a water alarm ($12) in the pan to be warned if the heater begins to leak.

As long as the water doesn't drain out of the heater somehow, no. What kind of car are we working on...

The word drain is a noun (drain, drains) or a verb(drain, drains, draining, drained). Examples:noun: The water ran down the drain.verb: I pulled the plug to drain the water.

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Drain the water from your 1987 Nissan Stanza. Remove the water return hose from the water pump. Remove the water pump retaining bolts. Reverse the process to install the new water pump.

you can drain the water out by friking draining it you dimwit

It is either the drain line below the air conditioner condenser or a leaky heater core. If the water is cold it is the drain line. If the water is warm and sweet smelling it is the heater core.

It is located in the bottom left corner of the radiator as you are looking forward. There is probably a short drain hose connected below the plug to drain the water away from the frame and onto the ground. Google the drain plug and you can see what it looks like.

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