How to Winterize Deck Jets, Bubblers, and Laminars

It's time to explore one of the most easily overlooked parts of closing a swimming pool for winter: the decorative water features. Deck jets, bubblers, and laminars may look like simple additions to a backyard pool, but their hidden plumbing and specialized components can be vulnerable to freezing temperatures. Knowing how to winterize deck jets, bubblers, and laminars correctly can help prevent cracked fittings, damaged housings, and frustrating surprises when you reopen the pool in spring.

These features deserve attention beyond the usual pump, filter, and skimmer winterization routine. Each has a different design, and the method that protects one feature may not adequately protect another. The goal is to remove trapped water, protect vulnerable components, and prevent water from returning to lines that have already been cleared.

Why Decorative Pool Features Need Separate Winterization

Water expands when it freezes. Inside a confined pipe, nozzle housing, or equipment chamber, that expansion can create enough pressure to damage plastic components and plumbing connections.

Deck jets often have narrow supply lines running beneath concrete decking. Bubblers typically connect to plumbing beneath a shallow tanning ledge or pool floor. Laminars may contain internal chambers, filters, electrical connections, and specialized housings that retain water even after their supply lines have been cleared.

One important distinction is that shutting off a water feature does not necessarily drain it. A closed valve can actually trap water inside the plumbing. Likewise, lowering the pool water level does not automatically empty underground water-feature lines.

Before You Start: Identify the Plumbing and Controls

Begin by locating the valves that control each water feature. Some pools use independent valves for deck jets, bubblers, and laminars. Others connect several features to a shared plumbing manifold.

With the pool operating normally before closing, identify which valves control each feature and document their positions. Photograph the equipment pad and label unfamiliar valves before making adjustments.

Pay particular attention to whether multiple outlets share one line. Three deck jets may connect through a common distribution loop, while two bubblers on a tanning ledge may receive water from separate branches. These arrangements can affect how completely trapped water can be removed.

Gather the manufacturer's instructions, compatible plugs, appropriate nozzle-removal tools, and equipment designed for pool-line winterization. Turn off the circulation pump and isolate electrical power to any lighting or water-feature equipment before disassembly.

Important: Clearing plumbing with compressed air can be hazardous if excessive pressure is used or an outlet becomes blocked. A pool professional should handle unfamiliar systems, and the equipment manufacturer's pressure and flow limits must always be followed.

How to Winterize Deck Jets

Deck jets create narrow arcs of water from outlets installed around the pool deck. Because their plumbing often passes beneath concrete, repairing freeze damage can be especially inconvenient.

Many deck jet assemblies have removable nozzles and bases. Some manufacturers specify a dedicated removal tool to avoid damaging the surrounding housing.

1. Turn off the water feature. Shut down the pump and verify that the plumbing is no longer pressurized.
2. Remove the nozzle assembly. Follow the instructions for the exact deck jet model. Some designs require removal of both the nozzle and its base.
3. Clear the supply line. Have the line blown out using an appropriate pool winterization blower and the manufacturer's specified procedure.
4. Protect the cleared outlet. Install the correct winterization plug to keep water from reentering the plumbing.
5. Secure removable parts. Clean and label nozzles, covers, and tools so they are available during spring reopening.

For multiple jets connected to a shared line, seeing air emerge from one outlet does not prove every branch is clear. Air can follow the path of least resistance, leaving water in another section. A professional may need to isolate outlets individually to verify complete clearing.

Never substitute an ordinary decorative cover for a pressure-rated winterization plug unless the manufacturer specifically approves it.

How to Winterize Pool Bubblers

Bubblers commonly sit on tanning ledges, sun shelves, or shallow entry areas. Unlike deck jets, their outlets may remain submerged when a pool is prepared for winter.

This creates an important complication: even after air pushes water out of the supply line, surrounding pool water can flow back through an unsealed bubbler opening.

Start by identifying the bubbler model, its supply plumbing, and any removable outlet components. Some fixtures accept dedicated winterizing plugs, while others require a different manufacturer-approved closing arrangement.

The line must be cleared through the appropriate plumbing connection and protected against water reentry. If the bubbler remains underwater, sealing the outlet correctly is especially important. The appropriate sequence depends on whether the system uses threaded fittings, specialized plugs, or another winterization method.

Do not assume every bubbler on a shared ledge has been protected just because air appeared at both outlets. Branches may have different lengths or low points that hold residual water.

What pool owners often miss: A shallow tanning ledge may freeze sooner than deeper pool water during a severe cold spell. The location of the bubbler and its plumbing matters, even when the rest of the pool appears adequately protected.

How to Winterize Laminar Water Features

Laminar jets create smooth, glasslike streams that appear almost solid. Their internal construction is generally more complicated than a conventional deck jet.

Many laminar assemblies are installed inside dedicated deck canisters and include internal water passages, supply connections, and sometimes LED lighting components.

Clearing the underground supply pipe alone may not remove water trapped inside the laminar body.

Depending on the model, proper winterization can involve removing the housing lid, disconnecting the supply union, draining the internal chamber, clearing the supply line, and protecting the assembly against freezing.

Some laminar designs require removing the internal assembly and storing it in a dry location. Other models specify draining and repositioning the assembly within its housing. These procedures should not be treated as interchangeable.

Lighted laminars require additional care around electrical connectors and delicate internal parts. Disconnect power before beginning, and never pull on electrical wiring to lift an assembly.

Keep O-rings, unions, fasteners, and specialized winterization fittings together. Small missing components can turn an otherwise simple spring startup into a frustrating repair.

Why Blowing Air Through a Line Is Not Always Enough

A common winterization mistake is assuming that a few seconds of visible air bubbles means the plumbing is completely empty.

Underground water-feature lines can contain low spots where water collects. Shared manifolds can direct airflow toward easier outlets, bypassing more restrictive branches. Check valves may also prevent air from reaching certain plumbing sections.

For that reason, the winterization process should account for pipe layout, valves, check valves, equipment elevation, and the specific outlets being protected.

Using excessive air pressure is not a solution. It can damage fittings, separate connections, or create dangerous conditions. Appropriate equipment, controlled airflow, and correct outlet isolation are more important than simply increasing pressure.

Some winterization procedures include manufacturer-approved pool antifreeze as additional protection in designated plumbing sections. Only products labeled for swimming pool winterization should be considered, and antifreeze should never replace proper line clearing or be added without confirming equipment compatibility.

Common Winterization Mistakes That Cause Problems

Another easily missed issue is automation. A programmed cleaning cycle, scheduled water-feature setting, or automated valve can unexpectedly activate equipment during closing or after winterization. Disable schedules and verify that the control system cannot restart drained equipment.

Should You Lower the Pool Water Below the Features?

Not necessarily. The correct winter water level depends on the pool's construction, cover system, plumbing layout, climate, and manufacturer requirements.

Deck jets installed above the pool waterline may be accessible without lowering the water. Submerged bubblers generally require a reliable method of clearing and sealing their plumbing, regardless of whether the water remains above the outlets.

Aggressively lowering a pool is not automatically safer. Vinyl liners, fiberglass shells, and certain in-ground pool installations can be damaged by inappropriate draining practices or unfavorable groundwater conditions.

Follow the closing requirements for your particular pool rather than lowering water solely to expose a decorative feature.

What to Check Before Installing the Winter Cover

After the water features have been winterized, conduct one final inspection. Confirm that all required plugs are installed, removable parts are accounted for, and electrical components are protected as directed.

Make a written record of which valves were closed and which lines were cleared. This information is particularly useful if someone else opens the pool in spring.

Inspect exposed deck jet housings and laminar canisters for cracked plastic, loose fittings, or damaged covers. If a component appears compromised, address it before freezing conditions arrive rather than relying on a cover to protect it.

Once the winter cover is installed, avoid operating decorative water features until the system has been properly reopened and its plumbing restored.

What If the Pool Loses Water After Winterization?

A falling water level after closing does not automatically mean a deck jet, bubbler, or laminar line has cracked. Rainfall changes, evaporation, cover conditions, and existing plumbing problems can complicate the picture.

If the pool is uncovered and conditions permit a meaningful comparison, the Mini Bucket Test can be a useful first-step tool for comparing normal evaporation with possible leak-related water loss. It cannot identify a damaged water-feature line or provide a definitive leak diagnosis. Testing conditions and the manufacturer's setup instructions matter.

If water loss continues or seems connected to a particular water feature, professional leak detection and plumbing pressure testing may be appropriate once conditions allow.

When Should You Call a Pool Professional?

Professional winterization is especially worthwhile when the water-feature plumbing is unfamiliar, multiple outlets share hidden lines, or a laminar assembly contains specialized electrical components.

Consider professional service if you cannot identify the supply valves, cannot locate the appropriate winterization plugs, or suspect that a line already contains damaged fittings.

A qualified technician can also help identify overlooked check valves, buried branch connections, and other details that complicate winter closing.

Protect the Features You Want to Enjoy Next Summer

Deck jets, bubblers, and laminars bring movement and personality to a swimming pool, but their hidden plumbing requires deliberate freeze protection. The safest approach is to identify each system, follow its specific winterization instructions, remove trapped water, and prevent water from entering cleared lines again.

Taking those steps before the first hard freeze can help preserve delicate water-feature components and reduce the chance of spring repairs. When the pool reopens, you can focus on enjoying those beautiful water effects instead of troubleshooting avoidable winter damage.