Second-Source Pump & Valve Housing RFQ Checklist

# Second-Source Pump and Valve Housing RFQ Checklist

Second sourcing pump housings and valve bodies is not a normal price-shopping exercise. The buyer needs a backup supplier that can understand the existing drawing, pressure boundary, tooling path, machining datums, leak-test evidence, sample approval route, and documentation package before production risk is moved.

This checklist is for procurement, supply chain, and SQE teams qualifying a second-source aluminum casting supplier for pump housings, valve bodies, fluid-path housings, and pressure-sensitive industrial castings.

1. Decide why you need the second source

The qualification path changes depending on the business reason:

• •single-source supply risk
• •leakage or porosity issues at the incumbent supplier
• •capacity shortage or delayed deliveries
• •tooling ownership concerns
• •tariff, freight, or landed-cost pressure
• •regional supply-chain diversification
• •new product ramp beyond current supplier capacity

State the reason internally before contacting suppliers. It helps define urgency, evidence required, and whether the backup source must be production-ready or only qualified for contingency.

2. Prepare a safe technical package

You can qualify a second source without exposing unnecessary incumbent data. Prepare:

• •current 2D drawing and STEP model
• •alloy, temper, machining, finishing, and inspection requirements
• •sealed-cavity map for pump or valve pressure paths
• •known problem zones, described technically and without confidential blame
• •current annual volume and proposed second-source allocation
• •sample quantity and pilot-run expectation
• •delivery destination and packaging requirements
• •PPAP, FAI, CMM, leak-test, material certificate, or traceability needs

If drawings are controlled by NDA, start with a contact/NDA path before sending files.

3. Confirm tooling strategy

Second-source RFQs often fail because tooling assumptions are unclear. Ask whether the plan is:

• •transfer existing tooling
• •build new tooling to the same print
• •build new tooling with buyer-approved adjustments
• •use prototype tooling only for validation

For each option, clarify ownership, storage, maintenance, revision handling, sample approval, and what happens if the buyer later changes volume allocation.

4. Compare approval evidence, not just price

For pump and valve housings, the backup supplier must prove it can support the same functional risks as the incumbent.

Evidence may include:

• •first article inspection report
• •CMM report on machining datums, sealing faces, ports, and bores
• •leak-test method and record format
• •material and heat-treatment certificates
• •NDT scope if pressure walls or bosses are high risk
• •PPAP or customer-specific approval package
• •lot traceability and corrective-action workflow

Ask the supplier which records are included in the quote and which require a separate scope decision.

5. Build the landed-cost comparison

A second source may look expensive or cheap depending on what is included. Compare:

• •tooling and sample cost
• •per-piece casting and machining cost
• •inspection and documentation cost
• •packaging, freight, duty, and Incoterm assumptions
• •inventory buffer
• •quality containment risk
• •communication and approval effort
• •time needed to become production-ready

For backup sourcing, the value is often risk reduction and optionality, not only immediate unit-price reduction.

6. Keep the first RFQ focused

Do not send every part number at once. Start with the pump or valve housing that has the clearest drawing package, highest supply risk, or highest quality pain. A focused first RFQ lets the supplier show how it handles process review, open questions, sample planning, and documentation.

Bohua RFQ path

Bohua can review second-source pump and valve housing RFQs for tooling path, sample approval, leak-test planning, CMM datum strategy, and quote-scope comparison. Start with the second-source casting supplier page, the pump housing quote path, the valve body quote path, or send a quote-ready package through the formal RFQ form.

FAQ

Should we transfer the incumbent tool to a second source?

Only if ownership, tool condition, process compatibility, and transfer rights are clear. Many buyers prefer new tooling for a backup supplier when the old tool is optimized for the incumbent process.

How much volume should a second source receive?

That depends on the buyer's risk model, approval cost, and operational needs. Some teams use a keep-warm order; others allocate a regular production share so the backup source remains active.

What should we hide from the backup supplier?

Protect confidential commercial terms, customer names, and incumbent-sensitive information. Share the technical facts needed to quote and validate the part: drawing, function, risk zones, inspection needs, and approval path.