Hose, PVC & Fittings

This is the connective tissue of an irrigation system: the Schedule 40 and 80 PVC that carries water from the pump to the house, the compression and barbed fittings that get it into poly tube and micro lines, and the hose, couplings and reels a crew handles every day. Most of the failures we hear about on nurseries start at a joint, not in the pipe, so the fitting family matters as much as the pipe size.

Below is how we help growers choose between PVC, compression, barbed micro and hose-thread hardware, what to check about pressure and water before ordering, and where the Spears, Tavlit, Dramm and Antelco lines each fit.

Which fitting family does the job: PVC, compression, barbed micro or hose thread?

Match the fitting to the pipe it joins, not to what happens to be on the shelf.

Solvent-weld PVC is for the permanent part of the system: mainlines, submains and manifolds. Spears Schedule 40 covers elbows, tees, couplings, reducers, adapters and unions for ordinary irrigation pressure. Schedule 80 has a heavier wall for higher pressure, and the CPVC versions are for hot water or aggressive chemistry. Rivulis molded PVC fittings handle the lateral and submain connections on drip blocks.

Compression fittings join polyethylene pipe without glue or clamps. Tavlit's FC couplings run from ½" to 2" and include reducing sizes such as ½" to ¾" and ¾" to 1", with FA adapters to get from PE to threaded pipe. Use these where a run may be moved or extended later.

Barbed micro fittings from Antelco connect 4/7 and ¼" tube: tees, elbows, couplings and plugs. Where a take-off leaves the lateral, the Xpando expands into the punched hole and the double-barb DB fittings give a firmer hold than a single barb.

Hose-thread hardware is the hand-watering side: Dramm ColorStorm rubber hose, crimped brass fittings, quick disconnects, swivels and reels for the propagation and finishing houses.

What do pressure, water chemistry and sunlight mean for the parts you order?

Three site conditions decide most of what we recommend.

Pressure. Know the working pressure at the point where the fitting sits, not just at the pump. Spears True Union 2000 ball valves are rated 235 psi at 73°F in the ½" to 2" IPS sizes, with flanged versions at 150 psi. PVC ratings fall as water temperature rises, so an overhead line in a hot house is not at its cold rating. Where pressure is high or the duty is industrial, step up from Schedule 40 to Schedule 80.

Water chemistry. Any line carrying fertilizer or chemical needs a check valve to stop backflow into the supply; Spears makes ball check and swing check patterns in Schedule 40 and 80 bodies. CPVC and Schedule 80 are the choice on injection lines. On the isolation side, Tavlit's butterfly valves come in brass or polypropylene bodies so the body can be matched to the water.

Sun. A ball valve that lives outside on a header needs UV protection. Irritec's Schedule 40 PVC ball valves are UV protected and built to stay easy to turn after a season in the open.

Tell us the pump, the static and working pressure and what goes through the line when you request a quote, and ask us about the fitting sizes at the same time.

What goes wrong on real nurseries, and how the lines differ

The mistakes repeat often enough that we can list them.

• A valve glued straight into the line, so the next repair means cutting pipe. A true union valve unscrews at both ends and comes out for service; Spears builds the True Union 2000 that way.
• Take-offs pushed into a lateral on a single barb, then blown out when the block is pressurized. Antelco's Xpando and double-barb fittings exist for exactly this.
• Reducing with two fittings and an adapter where one reducing coupling would do. Tavlit's FC1234, FC134 and FC112114 step sizes in a single piece.
• Hose ends crushed at the faucet. Dramm's Hose Protector puts a spring over the last length of hose, and a live swivel stops the twisting that kinks hose and wears couplings.

The lines divide by approach. Spears is the engineered PVC reference, with published pressure, temperature and chemical data behind the fittings. Tavlit supplies sound valves and compression fittings in quantity, with enough handle and thread combinations that the valve matches the run. Antelco goes deep on the small barbed parts nobody else stocks in depth. Dramm treats the hose as a tool: crimped brass ends, quick disconnects, and reels with a brake, with repair kits made for the same gear.