ARO 637440-4 Dual Inlet/Outlet Kit for PD20P and PW20P Pumps
The -4 variant of ARO's 637440 dual inlet/outlet kit, matched to PW20P and PD20P pump parts lists
SKU:637440-4
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Dash-4 dual inlet/outlet kit ARO 637440-4 lets each pump chamber use its own intake and discharge line; 41 ARO pumps list it.
WHERE TO BUY?
Ordering by dash number matters with the ARO 637440-4: it is one of several 637440 dual inlet/outlet kits, and this is the -4 variant. No material or size detail is published for it, so check the dash-4 callout on your pump's parts list first.
Dual inlet/outlet hardware splits a diaphragm pump's flow path so that the left and right chambers each have a dedicated intake and discharge. Plants use this to serve two lines from a single air supply. We see 637440-4 in 41 ARO parts lists, centered on the PW20P and PD20P families.
When This Kit Makes Sense
- Separate intake and discharge lines are needed for each pump chamber.
- A previous dual-port setup is leaking where the lines attach.
- The pump documentation lists 637440-4 for your model.
Compatible ARO Pump Models
- ARO PW20P-YPS-PTT
- ARO PW20P-YPS-PTL
- ARO PW20P-YPS-KTT
- ARO PD20P-YPS-KTT
- ARO PW20P-YPS-PAA
- ARO PW20P-YPS-KTL
- ARO PD20P-YPS-KTL
- ARO PD20P-YPS-PAA
Beyond these eight, the kit appears on 33 more ARO pumps.
| Part No | 637440-4 |
|---|---|
| Name | Dual Inlet/Outlet KIT for Diaphragm Pumps |
| Compatible Equipment | ARO diaphragm pump service |
| Brand | ARO |
| Product Type | Accessories |
