Koblenz uprights get bought for institutional work - schools, churches, hotels, offices - and they tend to stay in service for a very long time. The bag is what determines whether all that airflow ends up filtered or blown back into the room you just cleaned. This is a four-pack of Type A HEPA paper bags for the Koblenz U-series uprights, carrying the genuine part number 45-0766-1.
Fitment
These bags are listed for the Koblenz U-75 ZA, U-110 ZA, U-310 ZA, U-510 ZA and U-610 ZA uprights. OEM references are 45-0766-1 and 4507661.
Koblenz uses more than one bag family across the U-series, and the ZA suffix on the model number matters. If your machine's plate reads a plain Z rather than ZA, or you are working from a model number not in the list above, send it to us and we will confirm the right bag before you order.
Built for
- Janitorial resupply. A standing consumable for a cleaning closet that runs Koblenz uprights, sized so each machine gets its own pack.
- Specification compliance. Schools, healthcare facilities and green cleaning programs frequently write exhaust filtration into the spec, and the bag is how an existing upright meets it.
- Allergy-sensitive buildings. Anywhere the concern is not what the vacuum picks up but what it puts back out.
- Households with a commercial Koblenz. The Endurance-class uprights sell into homes too, and they take the same bag.
Why the HEPA bag is the practical filtration upgrade
Adding a filtration stage to a commercial upright usually means a filter kit, a different machine, or both. A HEPA bag is neither. It drops into the machine already in the closet and changes what comes out the exhaust immediately, which is why it is the first thing specified when a building tightens its cleaning standards.
The rating on this bag is 99.97 percent at 0.3 micron per the manufacturer listing, which is what keeps pollen, dust mite debris, bacteria and general fine allergen load inside the bag.
Fit is a filtration issue, not just a convenience one
An ill-fitting bag on a commercial upright leaks at the collar. That leak bypasses the filtration entirely - the machine still picks debris up off the carpet, then vents a share of the fines around the bag and into the room. Ordering by the genuine part number is the simplest way to avoid it.
Specifications
- Type: Type A HEPA disposable paper vacuum bags
- Quantity: 4 bags per pack
- Part numbers: 018-4507661, OEM 45-0766-1, also written 4507661
- Filtration: 99.97 percent at 0.3 micron per manufacturer listing
- Stated fitment: Koblenz U-75 ZA, U-110 ZA, U-310 ZA, U-510 ZA, U-610 ZA
- Brand: Koblenz
Frequently asked questions
Which Koblenz models take this bag?
It is listed for the Koblenz U-75 ZA, U-110 ZA, U-310 ZA, U-510 ZA and U-610 ZA uprights. Koblenz uses several bag families, so if your model plate does not match one of those, send us the number and we will confirm.
What is the OEM part number?
45-0766-1, also written 4507661. It is the Type A bag for the Koblenz U-series uprights.
What filtration level do these provide?
The manufacturer listing states 99.97 percent at 0.3 micron, which is what holds pollen, dust mite debris, bacteria and fine allergens inside the bag.
How is a HEPA bag different from a standard paper bag?
A standard paper bag lets a share of the fine particulate pass through to the exhaust. HEPA media captures those fines, which is why it is specified for allergy and institutional settings.
Can I use a reusable cloth bag instead?
Koblenz offers a reusable cloth bag for some uprights, but it is a different part and it does not provide HEPA-grade filtration. If filtration is the reason you are buying, use the HEPA paper bag.
Discount Cleaning Products is an authorized dealer for the vacuum and floor care brands we carry, with US-based support from people who work on this equipment every day. If you are not certain this part matches your machine, send us your model number and serial plate details and we will confirm the fit before you order.
