This lid is stamped for the Tuf-Tite 4 Hole Distribution Box, a specific footprint that dictates the entire fitment. If your tank does not carry the Tuf-Tite branding or the four-hole configuration, this part will not seat correctly.

Check the photo for the B1-RL designation and the specific lip geometry. If your existing lid has a different radius or bolt pattern, the seal will fail immediately upon installation.

The SimTech STF-110/7R is a 7-inch bristle filter designed for specific pipe diameters. This is a filter-only component, meaning you must already have the compatible housing or standpipe structure in place.

Look at the bristle density and the central core in the listing image. If your current filter has a different core diameter, this 7-inch unit will either rattle loose or jam the flow, causing immediate backflow issues.

This kit is explicitly sold without the connecting pipe, which is a critical exclusion for any installer expecting a complete assembly. It is a riser structure only, requiring you to source the vertical pipe separately to match your tank's outlet.

Examine the flange dimensions in the photo. If your tank's outlet is not a standard size that matches this riser's internal diameter, you will face a leak at the connection point that no amount of sealant can fix.

These are 4-inch pipe filters made from ultra-fine fiber, a material choice that prioritizes debris capture over high-flow velocity. They are sold in pairs, suggesting a dual-inlet or dual-outlet configuration.

Check the fiber texture in the product image. If your system handles high-volume grease or solids, this fine fiber may clog faster than a coarser bristle alternative, requiring more frequent maintenance than your schedule allows.

The 36-inch diameter is the defining spec for this Seal-R plastic cover. It is a rigid, single-piece unit designed to sit atop a riser of that exact width.

Look at the rim thickness in the photo. If your riser is 30 inches or 32 inches, this 36-inch cover will not seal, leaving a gap that allows odors and water intrusion into the tank.

This is a 16×12 inch Tuf-Tite riser, a rectangular footprint that differs from the standard round risers found in most residential systems. It is designed for specific tank geometries.

Verify the internal dimensions against your tank's outlet in the listing photo. If your tank uses a round outlet, this rectangular riser will not align, creating a structural gap that compromises the tank's integrity.

This Seal-R cover is 30 inches in diameter, a common size for many standard residential risers. It is a plastic unit designed for a tight, snap-on fit.

Inspect the edge profile in the image. If your riser is 36 inches, this 30-inch cover will be too small to bridge the gap, resulting in an unstable seal that can shift under foot traffic or vehicle weight.

This is a 274-gallon underground tank made of corrosion-resistant PP, equipped with a standpipe and observation hole cover. It is a complete system unit, not a retrofit part.

Check the standpipe height and the observation hole placement in the photo. If your site's soil depth or local code requires a different standpipe length, this fixed configuration may not meet your installation requirements.