For store development, design & construction
Spec Drain Protection Into Every Store
One prototype decision equals hundreds of installs. A permanent, certified sink screen removes breakroom drain callbacks from the punch list and from the maintenance budget that follows handover.
The precedent
From pilot to prototype standard
“I really appreciate what your product has done for the sites it is installed in—it’s impressive work.”
Master Plumber
Major Retailer with 1,900+ stores
What goes in the spec package
Everything a prototype or substitution review asks for, in the format it asks for it.
| CSI MasterFormat | Division 22 42 16.16 |
| Certification | ASME A112.18.2-2020 / CSA B125.2-20 |
| Material | Polished stainless (304 stainless steel), brushed trim ring |
| Construction | Proprietary double-walled technology; perforation surface area exceeds the connecting pipe |
| Fits | Standard 3½" drains; custom tube nut for 1-1/2" tailpiece |
| Install | ~15 minutes per drain, retrofit, no plumbing modifications |
| Warranty | 5-year commercial warranty on B2B installations |
Fitting a rollout
It has to survive the schedule, not just the spec
No trade coordination
Retrofit into the existing drain assembly with no plumbing modifications, so it does not add a plumbing scope item or a permit conversation to the package.
Fits the remodel window
~15 minutes per drain means a store's breakroom is done inside a normal fit-out day rather than pulling a crew back for a return visit.
Nothing to service after handover
No moving parts and nothing to replace, so it does not create a recurring line in the facilities budget the moment the store opens.
One SKU across the fleet
A standard 3½" drain is a standard 3½" drain, so the same specification carries across prototypes, remodels, and existing stores.
Certified performance
Certified test data for the submittal
Certified test data in the form a prototype or substitution review asks for. Measured values against the clause requirement, with the margin shown.
| Tested | Standard requires | Measured |
|---|---|---|
| Flow rate | ≥ 7.0 gpm @ 6" head | > 11.0 gpm — 57% above minimum |
| Screen aperture | ≤ 0.2 in (5 mm) | 0.08 in (2.0 mm) — 2.5× finer |
| Body wall thickness | ≥ 0.022 in (0.56 mm) | 0.029 in (0.74 mm) — 1.32× |
| Screen thickness | ≥ 0.015 in (0.38 mm) | 0.023 in (0.58 mm) — 1.53× |
| Thermal cycling | 7 cycles, 180 °F ↔ 70 °F | No cracking, leaking, or deformation |
| Hydrostatic pressure | 5.0 psi, 1 min | No leakage, cracking, or deformation |
| Seals leakage | 20 in (500 mm) column, 5 min | No leakage |
| Material | 300/400 series stainless | Type 304 stainless steel |
| Outlet size | — | 1½ in nominal OD |
| Outlet thread | 1½–11½ NPSM, ASME B1.20.1 | Conforms |
| Thread torque strength | 20 N·m (15 ft·lbf) | No stripping or thread damage |
| Corrosion | ASTM B117 neutral salt SC-2 | ≤1 defect/in²; none > 0.03 in |
| Serviceability | Standard tools | Serviceable with adjustable wrench |
| Markings | Permanent, visible after install | "SEMPERSCREEN" permanently marked |
Catalog dimensions
Install size 3½ in (88.9 mm) · install depth 2.8 in (71 mm) · tailpiece 1½ in cut threads · weight 1 lb (0.45 kg) · proprietary double-wall construction, polished screen.
What goes in the submittal
CSI MasterFormat Division 22 42 16.16, the certified performance table above, catalog dimensions, and the standard-tool serviceability finding that substitution reviews ask about.
Tested and COMPLIED with ASME A112.18.2-2020 / CSA B125.2-20.Screen permanently fixed to the body and not removable by occupants; the assembly installs and services with standard tools.
Program ROI calculator
What Do Breakroom Drain Callbacks Cost the Fleet?
Enter your program numbers. See the annual drain cost across the estate and what the SemperScreen® permanent sink screen eliminates.
Drain Maintenance Cost Calculator
Estimates based on your inputs.
* Estimates savings against recurring drain service calls. Sewage ejector failure risk ($3,000–$15,000+ per event) is not included. Product plus installation estimate based on standard portfolio pricing.
The case on paper
Why a Screen Beats a Policy
An engineering control, not a training program
NIOSH ranks engineering controls above administrative controls because they work without significant human interaction. Its criteria for a good engineering control include blocking the hazard at the source, needing minimal user action, and preventing users from interfering with the control.
By that federal definition, a drain control any person can defeat in two seconds sits in a lower category. The guidance side proves the point by accident: a state FOG best-practices document instructs operators to train kitchen staff not to remove drain screens, then concedes that success depends on the behavior of the employee. Another jurisdiction reproduced the instruction unchanged eighteen years later.
Grinding does not remove anything
A disposal changes particle size. It removes nothing from the waste stream, and macerated particles give grease more surface area to bind to. EPA identified grease as the most common cause of reported blockages at 47 percent, and 40 CFR 403.5(b)(3) prohibits discharging solids in amounts that will cause obstruction in the collection system.
Princeton, New Jersey bars mechanical garbage disposal waste from multi-family dwellings of three or more units except by written permission of the sewer engineer, and codifies drain screens as a required best management practice. Tahoe City Public Utility District bars commercial disposals from the public sewer and directs that screens be installed in all sinks receiving food waste.
SemperScreen® recommends that you always refer to local building codes when modifying a building’s plumbing system. Requirements vary by jurisdiction.
What the code actually asks of the pump
IPC 712.4.2 states what a pump must be capable of passing. It sets no limit on upstream screening, and the threshold tightened between editions.
| Pump type and code edition | Required capability |
|---|---|
| Receives water closet discharge, all editions | 2 in (51 mm) |
| Other pumps and ejectors, IPC 2012–2018 | 1 in (25.4 mm) |
| Other pumps and ejectors, IPC 2021, 2024 | 1/2 in (13 mm) |
| Certified screen aperture | 0.08 in (2.0 mm) |
A 0.08 in aperture is roughly six times finer than the largest particle the current code contemplates.
Sources EPA National Pretreatment Program · NIOSH Hierarchy of Controls, CDC · NC Department of Environment and Natural Resources, FOG Best Management Practices · Borough of Kennett Square, PA, FOG Best Practices · Municipality of Princeton, NJ § B34-22 and § B34-23 · Tahoe City Public Utility District Sewer FAQs · IPC 712.4.2.
One SKU
One SKU, every store format
Spec review
Put it in front of the prototype team
Sample kit ships free. No purchase commitment.
How a spec-in starts
- Sample kit to the prototype team, no commitment.
- A pilot at a handful of stores, scoped to your remodel schedule.
- Spec language and volume pricing for the prototype package.
Already have a distributor on the program? They can stock it by part number (call about specific distributors not listed).
| Distributor | Part Number |
|---|---|
| HJC/Hajoca | #2225843 |
| Ferguson | #4923243 |
| Reece | #2263774 |
| Grainger | #45194490 |
| General Plumbing Supply | Call |
| Winsupply | Call |
| CWH | #03203 |
| Best Plumbing | #99881382 |
| Hirsch Pipe & Supply | #6426627 |
What store development asks
New to the product? See how it works, or the properties and facilities overview.
