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12_83e8b758-7ee5-4673-959b-b312110d9c26 - Northline Parts

Sandpiper 286-015-604 Overlay Diaphragm for U1F S1F G1F SB1 ST1 ST2 AODD Pumps

SKU: NLT2T01190
$120.89 In Stock
$120.89
Sale price  $120.89 Regular price 
Ships for free in 2–4 business days.
This 286-015-604 component is an overlay diaphragm used in compatible Sandpiper air-operated double-diaphragm pumps.
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Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
Brand / Platform Application
Sandpiper U1F
Sandpiper S1F, G1F, SB1/SB2
Sandpiper ET1, ST1, ST2, T1F - configuration dependent

Product Overview

The diaphragm is a primary wear component separating the air and pumped-fluid sides of an AODD pump. Cracking, chemical attack, fatigue or deformation can reduce pumping performance or allow leakage. When servicing a diaphragm failure, inspect the companion diaphragm, plates, seals and air-valve condition.

Sandpiper's U1F repair documentation identifies 286-015-604 as an overlay diaphragm, typically used in pairs in the pump assembly. Cross-reference catalogs also list U1F, ET1, G1F, S1F, SB1/SB2 and ST1/ST2/T1F families depending on material configuration.

Key Features & Performance

  • Overlay diaphragm for AODD pump service
  • Sandpiper 286-015-604 reference
  • Used as a matched wear component in diaphragm assemblies
  • 1-inch pump-family application coverage

Technical Specifications

  • Component type: overlay diaphragm
  • AODD pump service part
  • Quantity required by pump BOM should be confirmed

OE / Reference Numbers

  • 286-015-604

Frequently Asked Questions

Is this an OEM part? This listing is for a replacement component. OE and manufacturer numbers are provided as fitment references and do not indicate original-manufacturer production unless the listing specifically states otherwise.

How do I verify fitment? Match the machine or engine model, the existing part number, and the mounting or connection details before ordering.

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