Freight Class for Plumbing Supplies
Plumbing supplies span a wide range, with most shipping at freight class 70 to 125.
What is the freight class for plumbing supplies?
Dense valves, fittings and metal fixtures rate lower; hollow pipe and bulky fixtures rate higher. Nesting and tight packaging raise density. Fragile porcelain fixtures add a handling consideration.
Because freight class is density-driven, there isn’t a single fixed number for plumbing supplies — class 70–125 is the common range. Run your actual dimensions and weight below to pin it down.
Two opposite products under one order
A plumbing order almost always mixes two freight profiles that behave nothing alike. Fittings, valves, faucets and connectors are dense solid metal (or heavy brass) that boxes tight and rates near class 70. Fixtures — toilets, sinks, tubs, vanity tops — are large, hollow, and often fragile vitreous china or acrylic, rating class 110–125. The same purchase order can carry a keg of dense brass fittings and a bulky ceramic toilet, and their blended density lands wherever the mix falls.
That split makes plumbing supplies a category where quoting off one component misleads. Ship the dense fittings and the bulky fixtures as one blended pallet and the fittings effectively subsidize the fixture's air; keep them separate and each takes its honest class. The fixtures add a second wrinkle the fittings don't: fragility. Vitreous china cracks, so fixtures need protective packaging that adds cube on top of an already-bulky, low-density item.
Plumbing Supplies freight class: worked examples
Density is weight ÷ volume (cubic feet = L × W × H in inches ÷ 1,728). Here is how typical plumbing supplies shipments measure out:
Boxed brass fittings and valves — class 70
Dense fittings in a carton, 24" × 18" × 18", 90 lb.
24 × 18 × 18 = 7,776 in³ ÷ 1,728 = 4.5 ft³. Density = 90 lb ÷ 4.5 ft³.
20.0 lb/ft³ → class 70 — solid metal fittings rate the cheap end of plumbing.
Crated ceramic toilet — class 125
A vitreous china toilet in a protective carton, 30" × 28" × 32", 120 lb.
30 × 28 × 32 = 26,880 in³ ÷ 1,728 = 15.6 ft³. Density = 120 lb ÷ 15.6 ft³.
7.7 lb/ft³ → inside 7–8 → class 125 — bulky, hollow, fragile fixtures rate high.
Cased faucets and small fixtures — class 100
Boxed faucets and fittings on a 48" × 40" pallet, 40" high, 450 lb.
48 × 40 × 40 = 76,800 in³ ÷ 1,728 = 44.4 ft³. Density = 450 lb ÷ 44.4 ft³.
10.1 lb/ft³ → class 100 — mixed mid-range plumbing goods.
Sort dense from bulky, protect the china
The working rule is the familiar one for mixed loads: keep dense fittings, valves and metal parts on their own tight, low pallets to hold class 70, and let bulky fixtures take their own class rather than dragging the metal up. Nest where you can — fittings and small fixtures often pack inside larger cartons, and stacked pipe/tubing telescopes like PVC pipe.
For porcelain and ceramic fixtures, packaging protects first and measures second: molded corners, foam and rigid crates guard against cracks, and the cube they add is the cost of the fixture arriving whole. Palletize fixtures upright and stable, keep stacks low so the fragile bottom units aren't crushed, and confirm larger tubs and vanities can be handled at the destination. Run each configuration through the calculator; a mixed plumbing pallet rarely measures where intuition puts it.
What affects plumbing supplies freight class
- Metal fittings vs. hollow pipe/fixtures
- Nesting and packaging
- Fragility (porcelain)
- Palletization
Common plumbing supplies shipments include valves and fittings, pipe and tubing, faucets, sinks and fixtures.
Class guides covering the 70–125 range:
Calculate the freight class for your plumbing supplies
Enter dimensions and weight to get the density-based class for your exact shipment.
Density-based estimate. Some commodities carry a fixed NMFC class — check our freight class by commodity pages.
Estimated Freight Class
Density
18.75
lb/ft³
Volume
53.33
ft³
Weight
1,000
lb
15–22.5 lb/ft³ → Class 70
Free PDF includes a watermark. Pro removes it & adds your brand.
Estimates only — verify freight class/NMFC and chargeable weight with your carrier.
How freight class is calculated (density scale)
Freight class is set by density = weight (lb) ÷ volume (ft³). Higher density → lower class → typically lower cost. Volume here is L × W × H × quantity.
| Density (lb/ft³) | Class |
|---|---|
| 50+ | 50 |
| 35 – 50 | 55 |
| 30 – 35 | 60 |
| 22.5 – 30 | 65 |
| 15 – 22.5 | 70 |
| 13.5 – 15 | 77.5 |
| 12 – 13.5 | 85 |
| 10.5 – 12 | 92.5 |
| 9 – 10.5 | 100 |
| 8 – 9 | 110 |
| 7 – 8 | 125 |
| 6 – 7 | 150 |
| 5 – 6 | 175 |
| 4 – 5 | 200 |
| 3 – 4 | 250 |
| 2 – 3 | 300 |
| 1 – 2 | 400 |
| 0 – 1 | 500 |
Frequently asked questions
What freight class is plumbing supplies?
Plumbing Supplies typically ships at freight class 70–125. The exact class is set by density — weight divided by volume — so packaging and dimensions can move it within that range.
What affects the freight class of plumbing supplies?
The main factors are metal fittings vs. hollow pipe/fixtures, nesting and packaging, fragility (porcelain), palletization. Denser, tightly packed loads rate a lower class and cost less to ship.
How do I find the exact freight class for plumbing supplies?
Measure your shipment and divide weight by volume to get density, then match it to the NMFC scale — the calculator above does this. Confirm the final class and NMFC item number with your carrier before booking.
What freight class are plumbing supplies?
Dense fittings, valves and faucets measure ~15–20 lb/ft³ → class 70; bulky fixtures like toilets and sinks are hollow and fragile at ~7–8 lb/ft³ → class 110–125. A mixed plumbing order lands between, set by the fitting-to-fixture ratio.
Should I ship fittings and fixtures together?
Usually not for rate. Dense fittings hold class 70 alone, but blending them with bulky fixtures averages the density up so the fittings subsidize the fixture's air. Keep dense metal parts tight and separate, and let fixtures take their own class.
How do I ship a toilet or sink without breakage?
Vitreous china and ceramic fixtures crack, so they need molded corner protection, foam and rigid packaging, shipped upright and stacked low so bottom units aren't crushed. The protective cube is the cost of arriving whole; confirm large fixtures can be handled at delivery.