3
2
ProAir™ 4
Weighted Diffuser
Installation & Maintenance Instructions
Aeration
tHAnK-YOU FOr PUrCHASInG tHe PrOAIr™ 4
The ProAir™ 4 is the most advanced diffuser on the market today and is specifically designed
to maximize circulation and oxygen transfer in ponds and lakes. The ProAir™ 4’s weighted
sled design keeps the diffuser submerged and prevents it from sinking into the muck. The
exclusive PTFE non-stick membrane sticks provide the synergy of air stones while being
virtually maintenance-free. Each diffuser also includes a check valve to prevent back pressure
to the compressor.
InStALLAtIOn:
Step 1
Align Diffuser Manifold with one Diffuser
Sled ensuring the Airmax® logo on the
Diffuser Manifold is facing up. (Figure 1)
Step 2
Hand tighten two Membrane Sticks onto
Diffuser Sled. (Figure 2) NOTE: Do not remove
black rubber o-rings from membrane sticks.
Step 3
Align second Diffuser Sled with
Diffuser Manifold (Figure 3)
Step 4
Hand tighten two more Membrane Sticks
onto the second Diffuser Sled. (Figure 4)
Step 5
Depending on the size of airline, screw on
corresponding reducer fitting and firmly
tighten stainless hose clamp onto airline to
secure in place. (Figure 5)
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
ProAir™ 4 Diffuser Sled
Pre-Weighted
Membrane Sticks
reducer
Adapters
Marine Stainless
Hose Clamp
Diffuser
Manifold
1/2” 3/8”
Check Valve
#490332 – Diffuser Manifold
#490337 – Diffuser Sled
#510168 – PTFE 6” Membrane Stick
#490158 – Marine Stainless Hose Clamp
#490118 – ½” to ¾” Insert Reducer Adapter
#490118 –
3
⁄
8
” to ¾” Insert Reducer Adapter
#490340 – Check Valve
rePLACeMent PArt IteM #’S
