If The Media Is Running Out Through The Backwash Manifold During Backwash; If Media Is Running Out Through The Outlet Manifold During Filtration - Netafim SANDSTORM User Manual

TROUBLESHOOTING

If media is running out through the outlet manifold during filtration:

Replacing a damaged under-drain diffuser part ("flute" or "mushroom"):
1. Release the pressure and drain the filtration system. Open any valve downstream from the filtration
system or the manual valve (if installed) on the outlet manifold end-cap, until the pressure is fully
released. Check the pressure gauge to make sure it is at 0 before proceeding.
2. Empty the water from the filtration system.
TIP
To speed up emptying the water from the filtration system,
you can temporarily dismantle the outlet manifold end-cap.
3. Open the top service ports of all the tanks.
4. Gently remove the media from all the tanks.
WARNING
Do not use tools (such as a shovel) to remove the media, as this could damage the tank under-drain
diffusers ("flutes" or "mushrooms").
5. Clean any media remaining on the under-drain diffuser with pressurized water (with a hose, through the
top service ports).
6. Visually identify the damaged under-drain diffuser part/s ("flute/s" or "mushroom/s") with the aid of a
flashlight.
ATTENTION
There may be more than one tank losing gravel.
ATTENTION
Screw, unscrew and fasten the under-drain diffuser parts by hand only. Do not use tools, as this
could damage the under-drain diffusers ("flutes" or "mushrooms").
7. Manually unscrew the damaged under-drain diffuser part.
8. Check the integrity of the following parts and replace them it if necessary:
• Single-chamber tank - the plastic washer (yellow).
• Double-chamber tank - the rubber gasket.
WARNING
A damaged rubber gasket may be difficult to pull out. Do not use a screwdriver (or any metal tool)
to remove it, as this could damage the tank protective coating.
9. Replace the damaged under-drain diffuser part ("flute" or "mushroom") with a new one.
ATTENTION
Do not forget to put the following parts back in place:
• Single-chamber tank - the plastic washer (yellow).
• Double-chamber tank - the rubber gasket.
18 SANDSTORM SINGLE-/DOUBLE-CHAMBER USER MANUAL
™
REV.
Material:
Finish:
Drawing No.
/1
Part No. Quantity:
Scale:
3-D Proj. Sheet Size:
1:5
A3
File Name:
MTL SNG 480508 S D