Graco 166072 Vee Rubber Packing

Quick facts for part 166072: a vee-lip rubber packing used in the rod/piston seal stack to control leakage and maintain pressure. Verify against your sprayer’s parts diagram before ordering.

Component type: V-packing (rubber)
Typical location: rod/piston packing stack
Purpose: seals dynamically to prevent fluid bypass
Fit check: your model’s diagram must list 166072
Best practice: replace full stack if wear is evident

$29.1

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Description

Product Overview & Fit Guidance

Compatible Machines

Use the list below as a quick guide. Always confirm against your sprayer’s parts diagram before ordering.

Graco pumps / sprayers whose parts list specifically calls out part 166072 (V-packing)
Seal stacks on Graco displacement pumps used across contractor & industrial airless units, where the diagram lists 166072
Selected Mark-Series and Ultra / Ultra Max II models when their official parts list specifies 166072 in the rod/piston packing stack
Other Graco fluid-handling systems that use vee-rubber packings with the exact 166072 dimension and profile

What this part does

Graco 166072 Vee Rubber Packing is a vee-lip sealing element used in rod/piston packing stacks. Its flexible rubber lips energize under pressure to control leakage, maintain prime, and protect the pump from premature wear.

Key specifications

Part number	166072
Component type	V-packing (rubber)
Typical location	Piston/rod seal stack in displacement pumps and fluid-handling assemblies
Primary function	Seals dynamically around a moving rod/piston to prevent fluid bypass and loss of pressure
Usage note	Installed in a stack with other packings/washers; orientation and order must follow the parts diagram

Fit checks before you buy

Match the callout in your model’s exploded view: the packing should be listed as 166072.
Confirm the seal stack orientation and count (some stacks mix materials and sizes).
If your manual lists a kit that includes 166072, you may prefer the full kit for a complete refresh.

When to replace

Persistent weeping at the throat or loss of pressure/prime
Noticeable scoring, swelling, or flattened lips on inspection
After abrasive/solvent-heavy jobs or at scheduled overhaul intervals

Basic installation notes

Depressurize the unit completely and follow lock-out procedures
Clean the gland/stack area; replace any damaged spacers or backup rings
Observe vee orientation and stack order exactly as shown in the parts diagram
Lightly lubricate if specified by the service manual; torque fasteners to spec

Frequently Asked Questions

Question	Answer
Will this fit my sprayer model?	Yes—if your official parts list or exploded diagram explicitly lists 166072 in the packing stack. If it shows a different number or only a kit, order that exact item/kit.
Is this the only packing I need?	Usually no. V-packings work as a stack with spacers/backups. Many users choose a complete packing kit to refresh all wear components at once.
Material and fluid compatibility	Rubber vee packings are widely compatible with typical architectural coatings. For hot solvents/abrasives, confirm the recommended material stack in your manual.
Can I mix old and new packings?	Mixing is not recommended. Uneven wear can compromise sealing. Replace the entire stack for best performance.