RV Sewer Parts and Black Water Plumbing

What size RV sewer hose fits my RV's waste outlet?

Most RVs have a 3-inch sewer outlet with a bayonet-style termination, and a standard 3-inch RV sewer hose with bayonet fittings connects directly to it. At the campground, a 4-in-1 adapter threads into 3-inch or 4-inch inlets or slips into unthreaded ones. Before ordering, inspect your termination. If the bayonet lugs are worn or the valve body is cracked, replace that first, because a new hose will not seal on a damaged outlet. When comparing hoses, check wall thickness in mils. A thicker wall resists punctures from gravel and sharp edges.

How long does a camper sewer hose need to be, and can I get a 100 ft sewer hose?

Most campsites put the sewer inlet within 10 to 20 feet of your outlet. A 20 ft camper sewer hose covers the majority of hookups, and so does a 10 ft hose joined to a 10 ft extension with bayonet couplings. A 100 ft gravity-drain hose is not practical. Waste needs a steady downhill slope to drain, and every extra joint is another place for a leak. For long or uphill runs, a macerator pump with a smaller-diameter discharge hose is the usual approach. On a standard gravity setup, a hose support keeps the line sloped toward the inlet.

Do I need a separate RV black water hose for the gray tank?

No. One 3-inch RV black water hose handles both tanks. Drain the black tank first, then the gray, so the soapy gray water rinses solids out of the hose. Keep the black valve closed until the tank is about two-thirds full, so there is enough liquid to carry solids out. Never use your sewer hose for fresh water tasks. If the black tank will not drain completely or the sensors still read full after dumping, check that the RV is level. Lynx RV leveling blocks correct an uneven pad so the tank drains toward the outlet.

Which RV sewer parts fix a leaking waste valve or outlet?

Leaks at the termination usually come from one of three sources: worn valve seals, a cracked valve body, or a missing gasket in the bayonet cap. Black tank valves are typically 3-inch, and gray tank valves are typically 1-1/2-inch. This collection includes Valterra and other replacement valve bodies, seal kits, and cable-actuated valves for valves mounted out of reach. Before ordering, measure the valve size and note whether it is handle-operated or cable-operated. Text or call 817-984-1852 with the markings on your existing valve and we will confirm the correct fit.

What do I need at a full-hookup campsite besides a sewer hose?

For the sewer connection, plan on a hose with fittings, a 4-in-1 inlet adapter, a hose support, and disposable gloves. A clear elbow is optional, but it shows you when the tank is running clear. Shore power is the other connection you make on arrival. A Southwire Surge Guard RV surge protector goes between the pedestal and your power cord. It protects your converter, air conditioner, and refrigerator from miswired pedestals and voltage spikes.