Aquarium Water | Reverse Osmosis | RODI Water | ReefKeeper Water

» What is an ASOV and what does it do?
» What is ASOV?
» ASOV - How it works?
» How to Install ASOV?
» Flow restrictor combined with flush:
» Flow restrictor - How to install or replace. Fast flush - When to use.
» Check valves


What is an ASOV and what does it do?
	Automatic shut-off valve is a must. It saves water, extends filter life, and improves the performance of your unit. As the storage tank fills the pressure inside increases, when the pressure equals � to 2/3 your feed water pressure, the water to the system is shut off. No waste. Since you subtract the storage pressure from the operating pressure, the storage pressure needs be limited.
What is ASOV?
	The automatic shut-off valve. This valve allows your system to turn off the water supply, using pressure from the pure water side of the system. Then the automatic shut-off valve will turn off the water supply to the unit,whenever there is sufficent pressure on the pure water side of your system.
ASOV - How it works?
	The automatic shut off feature works this way. The pure water runs right to left or left to right across the top of the valve, the side with the screws visible. (The right or left depends on how you are viewing the unit) Then the filtered water runs right to left or left to right across the bottom of the valve. When the pressure on the pure water side of the system builds to 60% of your home water pressure a small piston is pushed down and closes off the supply water. The entire unit shuts down shortly. We offer LIFETIME replacement on that part. It is the only real moving part on the system. You need to see if the screws on top of the valve can be snugged up, if that does not cure any the noise we will send a new ASOV right out. System shuts off when the tank is full or the line from the reef line is shut off.
How to Install ASOV?
	Looks very complex, but is really very simple. The water is simply traveling across the valve from left to right or right to left depends on how you look at it. Pure water travels across the top of the unit, the filtered water across the bottom. The valve has a top and a bottom. The top is the side with the (4) screws visible. The bottom has no visible screws and is marked in and out. The bottom of the valve is connected between the pre-filters and the membrane. Water from the pre-filters is directed to the ASOV(in). The filtered water continues from the out of the ASOV to the membrane end with only one connection, the membrane water inlet. So the bottom of this valve got in between the filters and the membrane. The top the side with the (4) screws connects across the pure water line, from the membrane pure water outlet. The pure water outlet of the membrane is on the membrane housing end with two connections. One connection goes to drain and the other is the pure water. The drain connection is not the one you want. Once you have located the pure water line, cut it and install the automatic shut off valve. Now the pure water path is interrupted by the ASOV as well.
Flow restrictor combined with flush:
	Cylindrical cartridge labeled 'Flow' with an arrow and a number is the flow restrictor. The flow restrictor regulates the water flow in the system. All reverse osmosis systems must rinse. If the ablity to rinse is comprised expect the system to stop producing pure water. The new flow restrictors we sell are combined with a flush valve. When the valve is closed (perpendicular), it acts as the flow restrictor. When opened (parallel), it acts as a flush. Please note that the valve does NOT shut off the drain water.
Flow restrictor - How to install or replace. Fast flush - When to use.
	To install: The flow restrictor needs to be installed on the drain line. Just cut the tubing squarely and push in the new restrictor. To replace: You will have to locate the old flow restrictor. There are two kinds used; hooked on the outside of the tubing (newer style) and inside of the tubing (older style). Older style restrictors - They're usually in the tubing closer to the fittings of the membrane housing. If not, they're somewhere in the line before the tubing runs off of the RO unit's bracket. Remove them by either pulling them out of the tubing or cut off the section of tubing they're in. Install the new one. Newer style restrictors - Just simply remove the old and install the new one. Newer restrictors may be push-in (like the ones we use) or have Jaco nut fittings (which are just screwed on). Fast Flush - When to use: The flushing process needs to be used whenever you first get a RO unit, let the unit sit inactive for more than 1 day or when you replace the filters. When you first get a RO unit, it's good to flush it off for at least 30 minutes. You have to flush off the unit for 1 minute per day of inactivity (i.e. - If your unit sits inactive for 5 days, flush it off for 5 minutes). When you change the filters, a good flush of about 15 minutes is a good idea.
Check valves
	Our units have a check valve installed on the pure water line, at the membrane housing pure water outlet. It is built into the elbow fitting. If that valve does not work than the system will not function correctly. The ASOV will not shut the water off. Should it fail, the normal failure mode for this valve is to stick shut, not to stay open. In the rare event the check valve should fail, or your Water machine from another manufacturer did not come with a check valve .We can supply an in-line valve so you will not have to disassemble the unit. Simply insert the check valve in the pure water line.