The Modern Day & Silent Master 12 Gallon Elastic Top Central Vacuum Paper Vacuum Bags - 3-Pack is an EnviroCare micro-filtration replacement bag set for top-filling central vacuum systems. This 12-gallon bag is commonly sold under part number MD814L and cross-references to 721-5 and older 721H bag numbers, with 3 bags per package.

These bags use micro-filtration bag media with an elastic top opening for open-top central vacuum units. Published product copy notes that the bag fits over the blue cloth support on certain MD-family systems and should be opened down and out inside the canister after installation so the bag can expand fully for better airflow and dust collection.

Published MD814L fitment lists cover a wide range of real model numbers, including older Modern Day A, B, B2, J, K, SR, M465h, M575h, and M615h units as well as taller Modern Day E, E2, QE2, E3, QE3, G23, SV, SVT, M715h, and M965 units. SilentMaster fitment lists include S1, S2, S3, S4, S5, SP2, SP3, and SP22, with other sellers also listing S44, S500R, S560R, S720R, and S900R. Because seller fitment lists vary by model family, the safest match is your current bag number MD814L / 721-5 / 721H and your unit’s existing bag style.

Swiss Boy Vacuum is the trusted supplier for central vacuum bags, parts, and service. We are a family-owned authorized dealer in Bountiful, Utah, serving customers since 1963 with a large showroom and decades of central vacuum experience. Need help checking fit before you order? Call 801-298-3656.

Why Choose This Product?

• 12 gallon capacity for MD-family top-filling central vacuum units.
• Sold as a 3-pack, so you have multiple bag changes on hand.
• Uses an elastic top opening for open-top central vacuum bag supports.
• Cross-references MD814L, DES-MD814L, 721-5, and older 721H bag numbers.
• Fits over the blue cloth support #711 on Air-Force, SilentMaster, and Modern Day systems according to published product copy.
• Covers named Modern Day models including A, B, B2, J, K, SR, M465h, M575h, M615h, E, E2, QE2, E3, QE3, G23, SV, SVT, M715h, and M965.
• Covers named SilentMaster models including S1, S2, S3, S4, S5, SP2, SP3, SP22, S44, S500R, S560R, S720R, and S900R.
• Also published for Flo-Master M19, M31, M32, M34, M45, M64, M72, M85, M92, F450t, F600t, F650t, F700t and Air-Flo CFM-2 / CFM-3 bag applications.

Specifications

• Brand: EnviroCare.
• Part Number: MD814L.
• Distributor #: 06-2403-03.
• Material: Micro-filtration bag media / paper bag style.
• Capacity: 12 gallons.
• Included: 3 vacuum bags.
• Compatible Accessories: Blue cloth support #711.
• Status: Active.

Compatibility List

Air-Flo Models: CFM-2, CFM-3.

Air-Force Models: AF2, AF4, AF5.

Flo-Master Models: F450t, F600t, F650t, F700t, M19, M31, M32, M34, M45, M64, M72, M85, M92.

Modern Day Models: A, B, B2, E, E2, E3, G23, J, K, M465h, M575h, M615h, M715h, M965, QE2, QE3, SR, SV, SVT.

Silent Master Models: S1, S2, S3, S4, S5, S44, SP2, SP3, SP22, SSP2, S500R, S560R, S720R, S900R.

Use Case

This product is for homeowners maintaining a larger top-filling central vacuum unit that uses an elastic-top disposable bag. When the old bag is packed full, airflow drops and bag changes get messy. A fresh MD814L bag restores full collection space, keeps fine dust inside the canister, and makes the next maintenance interval much cleaner.