How to adjust the gate valve on red sea reefer

merereef

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This is something i got from red sea so thought id share with you helped me a great deal. The only thing i dont agree with is the fact they recommend water level to be about 1cm below the emergency pipe.. i thing its better and easier to have a slow trickle going through the emergency


First turn off any internal flow pumps, this will ensure the issue is the flow adjustment and not the weir being surged by flow pump wave action. Turn the valve fully clockwise to close the valve, this will send the water over the centre pipe which is the overflow.
Slowly open the valve, allowing a few minutes between each adjustment, when you get to final adjustments they will be no more than 0.5 to 1mm increments. You will see the level fall lower than the centre pipe overflow, you are looking for a level 1 to 2 cm below the top edge of the over flow pipe.

The large bore pipe on the right underflows, the overflow point of this pipe is lower than the centre overflow pipe, the balance between the main down flow pipe and the overflow is what ensures the silent operation. Once you have a balanced quiet down flow you can restart any internal pumps, if the weir becomes noisy again alter the height or the flow cycle of the flow pumps so as not to surge the weir.

If you are having issues opening and closing the down flow valve you will first need to check the diaphragm within the valve is clear of any obstruction, maintenance of the down flow valve is a simple procedure as follows.

1. Stop the main return pump and isolate from the mains to prevent accidental starting.
2. Open the down flow valve fully allowing it to drain to the sump.
3. Remove the bolt dust caps and remove the four screws with an Allen key.
4. Gently remove the head of the valve.
5. Clean the body of the valve whilst it is still attached, remove any deposits from the head of the valve, you may need to remove the diaphragm and soak in a weak acid solution (White Vinegar) this will help remove and calcium and bio film deposits. The valve head may look typically look like the following.
cid:image006.jpg@01D39B40.A06C4A20

Before Cleaning After Cleaning
6. Then simply replace the Valve Head ensuring the lugs shown in the after-cleaning picture are horizontal, these will locate into lugs on the valve body.
7. Replace the four screws, when reassembling the valve assembly on the body, ensure that all four screws are tight enough to give a watertight seal however do not use excessive force.
8. Replace the rubber plugs.
9. Return the main return pump to service and check for leaks.

Another known issue is one of variable mains voltage, this alters the hertz cycle of any return pump that is of an AC type, we have found that DC pumps which are transformed offer a much more stable voltage offering a more stable flow, this is also something worth consideration
 

Deiblerj

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This might be a dumb question but why do you need a gate valve there anyways?

If you want to adjust the water level in your overflow box wouldn’t you need to adjust the pipes?

I’m sure there is a good reason I’m having a hard time visualizing haha
 

pelphrey

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This is something i got from red sea so thought id share with you helped me a great deal. The only thing i dont agree with is the fact they recommend water level to be about 1cm below the emergency pipe.. i thing its better and easier to have a slow trickle going through the emergency


First turn off any internal flow pumps, this will ensure the issue is the flow adjustment and not the weir being surged by flow pump wave action. Turn the valve fully clockwise to close the valve, this will send the water over the centre pipe which is the overflow.
Slowly open the valve, allowing a few minutes between each adjustment, when you get to final adjustments they will be no more than 0.5 to 1mm increments. You will see the level fall lower than the centre pipe overflow, you are looking for a level 1 to 2 cm below the top edge of the over flow pipe.

The large bore pipe on the right underflows, the overflow point of this pipe is lower than the centre overflow pipe, the balance between the main down flow pipe and the overflow is what ensures the silent operation. Once you have a balanced quiet down flow you can restart any internal pumps, if the weir becomes noisy again alter the height or the flow cycle of the flow pumps so as not to surge the weir.

If you are having issues opening and closing the down flow valve you will first need to check the diaphragm within the valve is clear of any obstruction, maintenance of the down flow valve is a simple procedure as follows.

1. Stop the main return pump and isolate from the mains to prevent accidental starting.
2. Open the down flow valve fully allowing it to drain to the sump.
3. Remove the bolt dust caps and remove the four screws with an Allen key.
4. Gently remove the head of the valve.
5. Clean the body of the valve whilst it is still attached, remove any deposits from the head of the valve, you may need to remove the diaphragm and soak in a weak acid solution (White Vinegar) this will help remove and calcium and bio film deposits. The valve head may look typically look like the following.
cid:image006.jpg@01D39B40.A06C4A20

Before Cleaning After Cleaning
6. Then simply replace the Valve Head ensuring the lugs shown in the after-cleaning picture are horizontal, these will locate into lugs on the valve body.
7. Replace the four screws, when reassembling the valve assembly on the body, ensure that all four screws are tight enough to give a watertight seal however do not use excessive force.
8. Replace the rubber plugs.
9. Return the main return pump to service and check for leaks.

Another known issue is one of variable mains voltage, this alters the hertz cycle of any return pump that is of an AC type, we have found that DC pumps which are transformed offer a much more stable voltage offering a more stable flow, this is also something worth consideration
Great write up, I'll add that swapping the stock valve for a true gate valve is a NICE upgrade!

This might be a dumb question but why do you need a gate valve there anyways?

If you want to adjust the water level in your overflow box wouldn’t you need to adjust the pipes?

I’m sure there is a good reason I’m having a hard time visualizing haha
Gate valves are used in the "herbie" overflow. the pipes in the Red Sea tanks can't be adjusted (Or they could be but they aren't parts you can pickup locally if you break one). The idea behind the gate valve is to create a full siphon and not let any air into the plumbing. Also eliminating any noise!
 

Deiblerj

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Ah I think I just got it after a few google pictures....the main drain pipe is underwater in the overflow so to control the flow to your sump you need the valve. This would also mean you need a valve on the return to match the flow in and out...maybe?
 

Deiblerj

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Great write up, I'll add that swapping the stock valve for a true gate valve is a NICE upgrade!



Gate valves are used in the "herbie" overflow. the pipes in the Red Sea tanks can't be adjusted (Or they could be but they aren't parts you can pickup locally if you break one). The idea behind the gate valve is to create a full siphon and not let any air into the plumbing. Also eliminating any noise!
Gotcha! Thanks!
 
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merereef

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Ah I think I just got it after a few google pictures....the main drain pipe is underwater in the overflow so to control the flow to your sump you need the valve. This would also mean you need a valve on the return to match the flow in and out...maybe?
You really dont need a valve for the return pipe.. the max flow recommended for these tanks varies from tank to tank.. best to check with red sea or on their website get the recommended flow for the return pump or less and adjust the main drain valve to the pump..
 
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merereef

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Great write up, I'll add that swapping the stock valve for a true gate valve is a NICE upgrade!



Gate valves are used in the "herbie" overflow. the pipes in the Red Sea tanks can't be adjusted (Or they could be but they aren't parts you can pickup locally if you break one). The idea behind the gate valve is to create a full siphon and not let any air into the plumbing. Also eliminating any noise!

Thanks pelphrey maybe make a vid on your youtube channel
 

pelphrey

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Here is a great video on it -

 

shoggoth43

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That last part in their information is critical. You'll want to select either a DC pump, or one of the AC pumps with the RPM/flow stabilization in them. We have a LOT of people who have Red Sea tanks complain about having to constantly mess with the valves either daily or every few days. Usually once we put a Vectra or similar on there it's rock solid after they dial in the valve. This applies to any tank that uses a Herbie style overflow such as Red Sea, Waterbox, Elos, etc. Bean Animal overflows can handle a wider range of fluctuation without becoming noisy.
 

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