Horizontal 304 stainless steel floor drain — a reference SKU from the 360° rotating outlet product page. Source: Ningbo Xianglong Metal Products Co., Ltd. (xianglongmetal.com).

1. Why a structured RFQ matters

The first inquiry email from a new buyer sets the tone for the entire supplier relationship. A vague inquiry — "please quote stainless steel floor drain, FOB Ningbo, 1000 pcs" — looks identical to a hundred other generic inquiries the factory receives every week, and the factory's response is typically a generic catalog and price list. A structured RFQ that specifies all 14 points below lets the factory evaluate the buyer's technical maturity, allocate the right engineering resource, and prepare a meaningful quotation in a single round rather than five. The buyer's downstream savings are substantial: one round of clarification per week during the inquiry phase multiplies into a 3-5 week delay on the order cycle, which directly affects the buyer's inventory and cash-flow planning.

The 14 points are organized into four groups: drain specifications (points 1-5), commercial terms (points 6-9), logistics and branding (points 10-12), and post-shipment support (points 13-14). The grouping mirrors the typical quotation workflow at the manufacturer's end — the engineering team handles points 1-5, the commercial team handles points 6-9, the logistics team handles points 10-12, and the after-sales team handles points 13-14. Sending all four groups in the first inquiry allows the manufacturer to parallel-track the four teams rather than serializing the work, which compresses the quotation cycle from the typical 5-7 business days to 2-3 business days.

2. Drain specifications — points 1 to 5

Point 1: Drain type, dimensions, and outlet configuration

The first specification is the drain type and the dimensions: linear / square / round, length and width (or diameter), outlet size, outlet orientation (horizontal / vertical), and outlet configuration (side / center / corner). The reference is the manufacturer's existing product line — for example, the 360° rotating outlet product specifications document the length range as 300mm to 2000mm, the width as 70mm, the outlet diameter as 40mm, and the adjustable height as 47-70mm. Buyers who reuse these specifications can apply the manufacturer's standard pricing tier; buyers with custom dimensions trigger a tooling and setup cost that adds 3-7 days to the lead time and 8-15% to the unit price. The first inquiry should specify whether the dimensions match the standard catalog or whether a custom dimension is required.

Point 2: Material grade — 304 vs 316L vs copper

The second specification is the material grade. Stainless steel is not one material — the two dominant grades for floor drains are 304 and 316L, each with distinct chloride-resistance and cost profiles. 304 is suitable for residential and most commercial applications; 316L is the specification for pharmaceutical, marine, and high-chloride applications (coastal hotels, swimming pool decks, salt-chlorinated pool chemicals). The manufacturer's OEM procurement guidance notes that 316L is typically required where chloride exposure is sustained, because the 2-3% molybdenum addition improves chloride pitting resistance. Copper is a third option for premium bathroom brands where the warm-tone finish is a design requirement rather than a technical one — this is a niche specification and is typically priced 30-50% above 304.

Point 3: Surface finish

The third specification is the surface finish. The standard options at most factories are mirror, polish (satin or matte), and brushed. Mirror is the high-gloss reflective finish for premium residential bathrooms; polish is the low-gloss non-reflective finish for hotel and commercial applications; brushed is the directional-grain finish for industrial and utility-room applications. Custom finishes — PVD gold, PVD rose gold, PVD black, anti-fingerprint nano-coating — are available at most factories including Xianglong's custom surface finish option on request, typically with a 500+ pcs MOQ and a 4-week extension on the lead time. Sending the preferred surface finish in the first inquiry prevents the factory from quoting the default satin finish on the first quotation and then re-quoting on the second round when the actual finish is clarified.

Point 4: Flow rate and outlet compatibility

The fourth specification is the flow rate and the outlet compatibility. The reference specification at Xianglong is 30 L/min at the standard outlet diameter of 40mm, with the adjustable height range of 47-70mm allowing the drain to be leveled to the shower floor slope (typical slope 1-2%). Buyers should specify the required flow rate (typical residential shower is 12-20 L/min, commercial showers can reach 25-30 L/min), the destination country drainage standard (the European standard expects 0.6-0.8 L/s for showers, the North American standard expects 1.5-2.0 GPM per fixture), and the connector compatibility with the destination plumbing system (G1/2, G1, compression fitting, or push-fit). The outlet specification is the single most common source of RFQ clarification; specifying it upfront eliminates the typical 2-3 follow-up rounds.

Point 5: Quantity by size and by finish

The fifth specification is the quantity breakdown by size and by finish. Most buyers send a single MOQ figure ("1000 pcs"); better practice is to send the breakdown — 200 pcs of 600mm length in mirror, 300 pcs of 800mm length in brushed, 500 pcs of 1000mm length in polish. The breakdown lets the factory verify the per-size production schedule, the surface finish batch run, and the total raw-material pull. It also clarifies whether the buyer's MOQ meets the standard SKU tier (100 pcs per size per finish at Xianglong) or triggers a custom-tier MOQ (300-1000 pcs depending on the customization level). A clear breakdown compresses the production planning cycle by 3-5 days at the factory end.

3. Commercial terms — points 6 to 9

Point 6: Mill test report (MTR) requirement

The sixth specification is whether a mill test report (MTR) is required per shipment. An MTR is the certificate from the upstream steel mill that documents the heat number, the chemical composition, the mechanical properties, and the traceability link to the steel coil or plate used in the production. MTRs are commonly required for pharmaceutical, food-processing, marine, and public-infrastructure applications and are occasionally required for premium residential applications where the buyer wants third-party documentation of the grade. The manufacturer's procurement guidance specifically references MTRs as the verification mechanism for the 304 / 316L grade claim. Specifying the MTR requirement in the first inquiry avoids the typical re-quote when the buyer adds the requirement on the second round.

Point 7: Certifications and destination market

The seventh specification is the certification scope and the destination market. Different markets require different certifications: Europe typically requires CE marking and may reference EN standards; North America references UL or NSF; Australia references WaterMark; the Middle East references SASO; Southeast Asia varies by country. The Xianglong about-us page documents the certifications as TUV + ISO 9001 + ISO 14001 — this is the factory-level certification scope, not the product-level certification scope. For product-level certifications (CUPC for North America, WaterMark for Australia, EN 1253 series for European floor drains), the lead time and the cost vary, and the first inquiry should specify the destination to allow the factory to quote the correct certification path.

Point 8: Incoterm — FOB vs EXW vs CIF vs DDP

The eighth specification is the Incoterm. The four common Incoterms in OEM drain procurement are FOB (the buyer arranges ocean freight from the port of loading), EXW (the buyer arranges everything including factory pickup), CIF (the seller arranges ocean freight to the destination port), and DDP (the seller delivers to the buyer's warehouse including duties and customs clearance). Each Incoterm carries a different cost responsibility and a different risk boundary, and the price difference between EXW and DDP for a typical 1000-piece drain order is roughly 8-18% of the FOB price. The reference product page lists the FOB price range as 10-16 USD per piece, with the ocean freight cost of US $0.84/kg (minimum 50 kg) via Maersk and the transit time of 17-24 days.

Point 9: Payment terms

The ninth specification is the payment terms. Common payment terms in Chinese OEM drain procurement are T/T (telegraphic transfer, typically 30% deposit + 70% balance against the bill of lading), L/C (letter of credit, the most secure but the most paperwork-heavy), D/P (documents against payment, common for established buyers), D/A (documents against acceptance, less common), and PayPal or Western Union (typical for small sample orders). The reference product page lists the accepted payment methods as L/C, D/A, D/P, T/T, Western Union, and PayPal. Specifying the preferred payment term in the first inquiry avoids the typical back-and-forth on payment terms when the buyer's standard term does not match the factory's default T/T 30/70.

4. Logistics and branding — points 10 to 12

Point 10: Port of loading and shipping mark

The tenth specification is the port of loading and the shipping mark. The default port of loading in the Ningbo drain manufacturing cluster is Ningbo-Zhoushan (NBG), with Shanghai (SHA) as the second option for larger orders where direct Ningbo service is not available. The shipping mark is the printed identification on each carton that the buyer's warehouse uses to receive and inventory the shipment — typically 6-12 characters including the buyer's brand identifier, the PO number, and the destination country. Specifying the shipping mark in the first inquiry, or explicitly accepting the factory's standard shipping mark, eliminates the typical last-minute change that compresses the loading window from 7 days to 2 days.

Point 11: Packaging style and unit-per-carton

The eleventh specification is the packaging style and the unit-per-carton ratio. Standard export packaging is a single-piece bubble bag + multi-piece inner box + multi-piece master carton, with the unit-per-carton ratio determined by the drain length (a 600mm drain typically packs 5-10 pieces per master carton; a 1200mm drain typically packs 3-5 pieces per master carton). Custom packaging — printed inner boxes with the buyer's brand, custom master cartons, custom pallet configuration, drop-test certified packaging — is a customization tier that typically requires a 500+ pcs MOQ and adds 1-2 weeks to the lead time. The manufacturer's product page lists customized packaging style as one of the available customization options alongside customized size, custom color, and customized logo display.

Point 12: Logo display method

The twelfth specification is the logo display method. The two standard methods are silk-screen printing (suitable for logos with line-art or text-only graphics, typically 1-2 spot colors) and hot stamping (suitable for logos with metallic foil finish, typically gold or silver). The Xianglong product page lists both silk screen and hot stamping as available for logo printing. Custom logo display methods — laser engraving, etched logo, electroforming logo — are available on request with a tooling setup cost. Specifying the preferred logo method upfront, and providing the vector logo file (AI / EPS / PDF) in the first inquiry, prevents the typical 1-2 week delay on logo artwork preparation.

5. Post-shipment support — points 13 and 14

Point 13: Warranty terms and defect resolution policy

The thirteenth specification is the warranty terms and the defect resolution policy. Most OEM drain factories offer a 1-3 year warranty against manufacturing defects, with the warranty coverage typically excluding damage from improper installation, chemical exposure outside the material specification, or physical damage during transit. The defect resolution policy covers the typical scenarios: factory defect replacement (the factory produces a replacement piece for any piece with a manufacturing defect), pro-rata credit (the factory issues a credit note for the defective piece), or full refund (the factory refunds the defective piece's value, less the original shipping cost). The reference standard at Xianglong is documented through the after-sales communication channel at sales@xlnb.cn or +86-574-88007577.

Point 14: Communication cadence and escalation path

The fourteenth specification is the communication cadence and the escalation path. The typical OEM drain order cycle is 30-45 days from the deposit confirmation to the loading, with weekly status updates during production, a pre-shipment sample photo, and a post-loading documentation set (commercial invoice, packing list, bill of lading, MTR if applicable). The communication cadence should specify the preferred channel (email vs WhatsApp), the preferred frequency (weekly vs per milestone), and the escalation path (sales contact → sales manager → factory director). The Xianglong communication channels cover sales@xlnb.cn for the email contact, the +86-574-88007577 phone line, and the published WhatsApp channel on the company website. Specifying the cadence upfront eliminates the typical 3-5 round phone tag during the production phase.

6. Frequently asked questions on OEM shower drain RFQ

1. What is the most common mistake in the first OEM shower drain inquiry?

The most common mistake is sending the inquiry with only the model drawing or only the standard specification, without the destination market reference, the certification scope (Europe EN, North America UL/NSF, Australia WaterMark), the required sample quantity, the FOB vs. EXW preference, and the target delivery window. Specifying the destination market reference and the certification scope upfront reduces the back-and-forth cycle from a typical 3-5 rounds to a single round, and is what distinguishes a professional buyer from a beginner. The Xianglong 14-point RFQ checklist captures the 14 specification points that an experienced buyer should send in the first inquiry, regardless of the buyer company's size.

2. Should I send the inquiry by email or WhatsApp?

Both work for an OEM shower drain inquiry, and the Xianglong team responds to both channels within 24 hours on business days. Email is typically the better channel for specification attachments, drawings, and mill test report requests; WhatsApp is faster for quick clarifications, sample photos, and shipping mark revisions. The recommended workflow is: send the initial inquiry and drawings by email, follow up on the production status by WhatsApp, and confirm the final order and shipping documents by email. The Xianglong contact channels are sales@xlnb.cn, +86-574-88007577, and the WhatsApp line published on the company website.

3. What is the minimum order quantity (MOQ) for an OEM shower drain?

The MOQ for an OEM shower drain depends on the customization tier. For SKU reuse (drain sizes 300mm-2000mm with the standard 70mm width and 40mm diameter outlet, surface finish mirror/polish/brushed), the MOQ at Xianglong is 100 pcs per size per finish. For custom length (within the 300mm-2000mm range but in a non-standard length), the MOQ is typically 300 pcs. For fully custom size, custom outlet diameter, or custom packaging with customer branding, the MOQ is typically 500-1000 pcs depending on the customization complexity. Lower MOQ tiers (below 100 pcs) are not feasible at factory-direct because the per-unit setup cost is high.

4. What surface finish options are available for an OEM shower drain?

The standard surface finish options at Xianglong are mirror, polish (satin), and brushed. Mirror is the high-gloss reflective finish typically specified for residential premium bathrooms; polish (also called satin or matte) is the low-gloss non-reflective finish preferred for hotel and commercial applications; brushed is the directional-grain finish typically specified for industrial and utility-room applications. Custom finishes (PVD gold, PVD rose gold, PVD black, anti-fingerprint nano-coating) are available on request, typically with a 500+ pcs MOQ and a 4-week extension on the lead time. The Xianglong product line documents the standard finishes per SKU, and the factory sample service allows buyers to evaluate the finish under showroom lighting before placing the production order.

5. How long does a first OEM shower drain sample take?

A first OEM shower drain sample at a standard SKU takes 7-10 days from the order confirmation to the courier dispatch. For a custom sample (custom length, custom finish, custom packaging), add 3-5 days for the tooling setup. International courier transit time (DHL, FedEx, UPS from Ningbo to Europe / North America / Middle East / Southeast Asia) adds another 4-7 business days. Total realistic sample delivery window is therefore 11-21 days depending on the destination and the sample customization tier. The Xianglong sample service includes a free sample policy for first-time buyers at the standard SKU, with the buyer paying only the international courier cost (typically USD 35-65 for a 1-3 kg sample box).

Editorial basis: Each of the 14 RFQ points references the practical buyer-support experience of Ningbo Xianglong Metal Products Co., Ltd. (about-us page, certifications, founding date, factory footprint). Drain specifications (length 300-2000mm, width 70mm, outlet 40mm, height 47-70mm, flow rate 30 L/min) referenced from the 360° rotating outlet product page. Material-grade distinction (304 vs 316L) referenced from the OEM manufacturer procurement guidance. Last verified: 2026-07-21.