

Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The BSC PREFERRED MK110BK is a disposable valve marker designed for permanent, high-visibility marking on non-porous surfaces common in trade and industrial environments. The marker delivers weatherproof, fast-drying, opaque marks on glass, poly, and similar surfaces, making it reliable for labeling valves, pipe fittings, and other components in the field. The long-lasting tip holds up through repeated use on rough or irregular surfaces. Sold as a case of 12, this marker is a practical consumable for plumbing, HVAC, and mechanical contractors who need consistent, legible identification marks that hold up after installation.
This marker is suited for residential and commercial service work where valve identification, system labeling, or component marking is required. The opaque, weatherproof ink resists moisture and outdoor exposure, making it appropriate for both indoor mechanical rooms and exterior installations. Technicians use it to mark shutoff valves, manifolds, pipe runs, and equipment panels. The case quantity of 12 is standard for stocking service trucks and shop inventory. This product is equivalent to part number H-257BL.
Compatible with non-porous surfaces including glass and poly; equivalent to part number H-257BL. Suitable for general valve and component marking across plumbing, HVAC, and mechanical trade applications.
No tools or trade license required for use, but this marker is intended for use by trained trade professionals in system identification and labeling tasks. Store caps on when not in use to preserve tip condition. Avoid use on porous or heavily textured surfaces where ink adhesion may be reduced. Dispose of properly in accordance with local regulations for ink-containing products.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
Add install kit to cart
—
Thanks for subscribing!
This email has been registered!