The NDS Hydro-Pop™ Pop-Up Riser is a self-retracting irrigation riser that lifts a micro jet or micro spray emission device off the ground when your system is pressurized, then drops back down automatically when watering stops. Available in two sizes — the Large (SPOP / HYP 250) extending up to 9 in. and the Small (SPOPJR / HYPJ 250) extending up to 5 in. — it is ideal for on-grade irrigation of trees, shrubs, flower beds, groundcover, vegetable gardens, and container plants. Both sizes operate with water pressure as low as 15 PSI.
The riser features a 1/4 in. compression fit inlet that connects directly to standard 1/4 in. polyethylene micro tubing. A micro jet or micro spray head threads onto the top. Built from UV-inhibitor-treated polyethylene, it stands up to sun exposure season after season. The top of the riser must be installed 1 inch above soil level. It is especially well-suited for border strips, commercial landscaping, and any area where you want the benefits of overhead spray coverage without a visible stake sticking up when the system is off.
Side-by-side comparison of both available sizes.
| Specification | Large (SPOP / HYP 250) | Small (SPOPJR / HYPJ 250) |
|---|---|---|
| Retracted Height | 13.75 in. | 9.25 in. |
| Extended Height (in use) | 22.5 in. (max. 9 in. extension) | 14.5 in. (max. 5 in. extension) |
| Inlet Connection | 1/4 in. Compression Fit (NDS A220 or A250 tubing) | 1/4 in. Compression Fit (NDS A220 or A250 tubing) |
| Emission Device (Top) | Micro jet or micro spray (threaded, sold separately) | Micro jet or micro spray (threaded, sold separately) |
| Minimum Operating Pressure | 15 PSI | 15 PSI |
| Material | UV-inhibitor-treated polyethylene | UV-inhibitor-treated polyethylene |
| Installation Requirement | Top of riser must sit 1 in. above soil level | Top of riser must sit 1 in. above soil level |
| Pack Quantity | 25-Pack | 25-Pack |
| Brand | NDS | NDS |
What size tubing does the Pop-Up Riser connect to?
The riser has a 1/4 in. compression fit inlet that connects to standard 1/4 in. polyethylene micro tubing.
It is compatible with NDS A220 and A250 1/4 in. poly tubing. The micro spray or micro jet emission device threads onto the top of the riser and is sold separately.
Which size should I choose — Large or Small?
Choose the Large (SPOP) if you need the emitter to clear taller groundcover or dense foliage; it extends up to 9 in. when pressurized and stands 13.75 in. retracted. Choose the Small (SPOPJR) for lower-growing plants or tighter spaces; it extends up to 5 in. and stands 9.25 in. retracted.
Does the riser retract on its own?
Yes. The Hydro-Pop extends automatically when water pressure reaches at least 15 PSI and retracts immediately when the system shuts off — no manual adjustment needed.
What emission devices are compatible with the top of the riser?
A micro jet or micro spray emission device threads directly onto the top of the riser.
Browse DripWorks' selection of micro sprayers and adjustable sprayers to find a compatible head for your application.
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