RV Sewer Bumper End Caps: Camco & JR Products Parts Guide

Many RVs have a hollow square rear bumper used for storing a drained sewer hose. A missing end cap can let the hose slide out during travel. Replacement bumper caps are available in plain, vented, squeeze-grip, magnetic and retaining-tab designs. Choose the style that matches the actual square bumper opening and its existing retention method.

Sewer bumper end-cap parts diagram

The three elements below identify the components involved in retaining a stored sewer hose. This is a simplified installation reference, not a dimensioned manufacturer drawing.

Camco RV sewer bumper end caps

Camco offers both single replacement caps and two-packs. A standard push-in cap is different from a vented squeeze-grip design. Camco 40311 also has a magnetic attachment and internal lugs for a compatible bayonet-style sewer hose fitting.

Standard black bumper capCamco 40302 · Single capBasic black polyethylene plug for a compatible four-inch-square sewer-hose bumper.View replacement capVented caps with cap saversCamco 40303 · Two-packTwo black vented bumper caps with retaining cap-saver connections for compatible four-inch-square tubes.View replacement capMagnetic cap with hose-connector lugsCamco 40311 · Single capFor a compatible metal square bumper; interior lugs attach to a matching bayonet sewer-hose fitting.View replacement capSqueeze-grip vented bumper capCamco 40324 · Single capBlack squeeze-grip style with vent-screen design and a cap-saver feature.View replacement capSqueeze-grip vented bumper capsCamco 40325 · Two-packTwo vented four-inch-square caps with retaining ribs. Compare to the single 40324.View replacement cap

JR Products rubber bumper plugs

JR Products offers retaining-tab plugs for bumpers with matching holes, as well as tabless plugs for other openings. The manufacturer lists both 208-A and 358-A as two-packs for most compatible four-inch RV bumpers, with a 3¾-inch collar. The retaining tabs are an important difference, even though the plugs are similar in appearance.

Rubber plugs with retaining tabsJR Products 208-A · Two-packHigh-impact rubber plugs with tabs for pre-drilled retaining holes; manufacturer lists a 3¾-inch collar.View replacement capRubber bumper plugs without tabsJR Products 358-A · Two-packHigh-impact rubber tabless design for compatible four-inch bumper openings; manufacturer lists a 3¾-inch collar.View replacement cap

Bumper cap part-number comparison

Choosing the right replacement cap

1. Measure the bumper: Identify a four-inch-square opening and check the lip, thickness and internal clearance. Do not assume a round sewer-pipe cap fits.
2. Inspect the retention style: Existing holes may suit a tabbed plug, while a push-in rubber or squeeze-grip cap uses a different hold. Magnetic caps need a suitable metal bumper surface.
3. Consider the stored hose: If you want the end cap to help retrieve the hose, confirm the Camco 40311's internal lugs match the sewer-hose fitting rather than assuming any hose end attaches.
4. Check the package quantity: Camco 40302, 40311 and 40324 are listed individually; Camco 40303 and 40325, and JR Products 208-A and 358-A, are two-packs.
5. Check retention before travel: Wash and drain the hose, fit the cap fully and make sure it cannot loosen or be pushed out by the stored hose.

Need a separate carrier for an RV without a suitable hollow bumper? See the Valterra EZ sewer hose carrier sizes guide. For sewer hose end fittings and elbows, see the Camco RhinoFLEX parts guide.

All product links on this page open NewRVParts listings. Replacement components should be chosen using the existing bumper and part number.