An acrylic fountain panel is specified when the client wants water to appear to move through a block of light. The effect depends on edge geometry, LED position and water chemistry, in that order.
A hotel lobby in Doha installed a 2.2 m water wall in 20 mm cast acrylic with LED uplighting behind the sheet. The first version had water sheeting sideways at the bottom edge; the fix was a chamfer, not a new panel.
Acrylic fountain panel thickness and edge detail
- Wall face to 2 m: 15 mm cast acrylic
- Free-standing or 3 m: 20 mm, with a frame
- Bottom edge: 45 degree chamfer plus a 3 mm drip groove
- Top edge: level weir, within 0.5 mm across the width
The top edge is a weir and has to be level. A 1 mm variation across 2 m sends the flow to one side and the feature reads as broken from the first day. Machined and checked with a straight edge, not guillotined and hoped.
Light behind the panel
Lighting behind a clear panel is visible through the water, which is the effect. LED strips at the base, 150 to 200 mm behind the panel, wash upward and the moving water refracts the lines. LEDs directly against the panel show as hot spots and destroy the illusion.
Water chemistry is the long-term risk. Filtered, low-nutrient water keeps the wetted face clear; untreated water builds biofilm in weeks and the panel needs to be drained and wiped. That belongs in the specification, because the client will not budget for it later.
Where a fountain panel sits beside a pool or a spa, the structural logic overlaps with pool underwater windows, and the outdoor UV question is covered in UV resistant acrylic for outdoor projects.
Cleaning the dry face is straightforward with a neutral detergent; the cleaning and maintenance guide covers the agents that are safe on cast acrylic.
Send your feature drawing, flow rate and lighting layout to oversales@rpplexiglass.com for a panel quotation.
Frequently Asked Questions
What thickness acrylic for a fountain panel?
15 mm for a wall-mounted water face up to 2 m high, 20 mm for free-standing panels or where the water load is carried by the sheet. Thickness also sets how much the panel bows under flow.
Why does water cling to an acrylic fountain panel?
Surface energy and edge detail. Water follows a sharp edge and clings at the bottom. A 45 degree chamfer, or a drip groove 3 mm back from the face, breaks the cling and gives a clean fall.
Does acrylic stay clear in a fountain?
It stays clear if the water is clean. Warm water plus nutrients builds a biofilm on the wetted face within weeks, and the panel looks fogged. Filtration and a periodic wipe are part of the design, not maintenance afterthought.