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Rockford RP-4 Grease Interceptor – 8 lb Capacity, 4 GPM, 2" No-Hub

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Rockford RP-4 Grease Interceptor – 8 lb Capacity, 4 GPM, 2" No-Hub

Rockford RP-4 Grease Interceptor – 8 lb Capacity, 4 GPM, 2" No-Hub
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Compact Grease Interceptor

Rockford RP-4 — Compact Steel Grease Interceptor for Single-Fixture Applications

The Rockford RP-4 is a compact all-welded steel grease interceptor designed for single-fixture or low-flow commercial food-service applications. Rated at 4 GPM intermittent flow with 8 lb grease capacity and a 3.75-gallon static holding volume, it is ideal for small cafes, coffee shops, delis, concession stands, and any single-sink installation requiring code-compliant FOG control. Certified to PDI-G101 and built in Rockford, IL.

8 lb
Grease / Sludge Capacity
4 GPM
Intermittent Flow Rate
3.75 gal
Static Holding Capacity
2"
No-Hub Inlet / Outlet

Key Features of the Rockford RP-4

All-Welded Steel ConstructionFully welded body with no bolted joints — engineered to withstand continuous exposure to hot wastewater, fatty acids, and cleaning chemicals without leaks or distortion.
Dual Installation ModesSupports both on-the-floor and flush-with-the-floor installation, accommodating new construction and retrofit projects in tight under-counter spaces.
3/16" Diamond Tread CoverPedestrian-rated removable cover secured with stainless steel flat-head screws — safe for walk-over and easy to remove for routine cleanout without tools.
Heavy-Duty Leak-Proof GasketPrecision gasket seals the cover to the body — blocking grease odors, preventing pest intrusion, and stopping floor seepage in compact kitchen installations.
Enamel Coating Inside & OutInterior and exterior enamel coating protects the steel body from corrosive kitchen wastewater chemistry, maximizing service life in demanding commercial environments.
PDI-G101 CertifiedCertified to the Plumbing & Drainage Institute PDI-G101 standard — ensuring acceptance by municipal plumbing authorities and health departments nationwide.

RP-4 Specifications

ModelRP-4
Grease / Sludge Capacity8 lb
Flow Rate (Intermittent)4 GPM
Static Holding Capacity3.75 Gallons
Inlet / Outlet2" No-Hub
Width (Front to Back)13"
Length (Side to Side)18"
Height (Floor to Top)10.5"
Bottom to Center of Inlet7"
Cover Material3/16" Nonskid Diamond Tread Plate
Body ConstructionAll-Welded Steel
CoatingEnamel (Interior & Exterior)
Compliance StandardPDI-G101
Installation TypeOn-Floor or Flush-with-Floor
ManufacturerRockford Separators, Rockford, IL

Frequently Asked Questions

What is the grease capacity of the Rockford RP-4?

The RP-4 holds 8 lb of grease and sludge with a 3.75-gallon static liquid holding capacity. It is designed for single-fixture or low-flow applications such as small cafes, coffee shops, delis, and concession stands.

What flow rate does the RP-4 support?

The RP-4 is rated for 4 GPM intermittent flow with 2" no-hub inlet and outlet connections and an integrated flow control device that optimizes grease separation at low flow rates.

Can the RP-4 be installed flush with the floor?

Yes. The RP-4 supports both on-the-floor and flush-with-the-floor installation. The 3/16" diamond tread plate cover is pedestrian-rated and secured with stainless steel flat-head screws for safe walk-over traffic.

Is the RP-4 PDI-G101 certified?

Confirmed. The RP-4 is certified to the Plumbing & Drainage Institute PDI-G101 standard — the industry benchmark for grease interceptor performance — ensuring code acceptance with most local plumbing and health authorities.

What size inlet and outlet connections does the RP-4 use?

The RP-4 uses 2" no-hub inlet and outlet connections. This is a smaller connection size than the larger RP series models, making it appropriate for single-sink or low-flow plumbing configurations.

What optional upgrades are available for the RP-4?

Rockford offers factory upgrades at additional cost: anchor flange, epoxy coating, stainless steel construction, integral extension, alternate inlet/outlet sizing, aluminum cover, and threaded connections. Contact us for a custom quote.

Brand Rockford Seperators|Grease Traps
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$ 310.97 310.97 USD $ 310.97

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SKU RP-4
Brand Rockford Seperators|Grease Traps
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