Alpine PLG3500U Owner'S Manual Download Page 2

1. The filter has been designed to be used outdoors, but it does not have to be submerged.

2. Do not plug-in or otherwise use this product if any part of it appears to be damaged or operates  

     abnormally. Have the product examined and repaired, if necessary, by a qualified electrician.

3. Make a “drip loop” on the electrical cord connecting the filter to the plug by letting a portion of the          

     cord hang lower than either the filter or the plug.

4. This product is designed to be permanently wired to a main power supply, housed in a dry area  

     and must be buried.

5. Always disconnect the plug from the outlet before any maintenance or troubleshooting is  

     

     performed.

6. Avoid the bulb overheating, switch it off when there is no water inside the filter.

7. Avoid the direct contact with UV-C light which can be harmful to your eyes and the skin.  

8. To clean the filter, simply rotate the handle and the filter will self-clean itself.                  

Choose a more suitable place to install the filter. You will need to dig a six inch deep channel connecting 

the blower and upper pond basins. This channel will allow you to bury and conceal the tubing once 

connected. You will also need to create a hole partially bury the bio-filter while keeping it in an upright 

and level position. The filter can buried in the ground up to the filter clips (See figure 1). Connect your 

pump to the filter tubing connector marked by the symbol in arrow with flexible hose. Lay the hose in the 

channel. Attach the tubing to the filters connector marked by the symbol out arrow and lay it in the 

channel leading to the upper pond basin. You should use stainless steel clamps to create a water tight 

seal at all of your tubing connection (filter and pump) (See figure 2). The correct functioning of the UV-C 

bulb is indicated by the lighting visible on the top of the outer lid (See figure3).  Figure 3 also indicates 

how to use the self-cleaning mechanism of the filter. 

After submerging the pump in water, plug it to check both the pump and bio-filter performance.

Your filter is designed to let you know when filtration performance declines. Your filter is equipped with 

color-coded pressure indicator

 located on the container lid. When your filter is operating 

effectively, the pressure indicator will display green. If flow rate within your filter drops, performance 

also declines and the pressure indicator will display RED (See figure 4). The filter can be opened and 

the individual filter component can be cleaned and washed manually. Unlatch the clips and remove 

the container lid. Wash the filter sponge with clean tap water.The bio-ball should only be cleaned if 

they are highly contaminated and you should only use pond water to preserve the microorganisms 

and keep the filter biologically active.When reassembling the device, make sure the o-ring is correctly 

positioned for a watertight seal (See figure 5). If the seal is out of place or missing there will be 

significant leakage when filter is operating.              

If the algae proliferate, it is necessary to check and correct the functioning of the UV-C bulb. To               

change bulb, first unplug the pump and bio-filter from its power source. Rotate the lid cover, until the 

arrows on the lid cover aim at the arrow on the ring holder (See figure 5). Remove the lid cover from 

the top of container lid (See figure 6). Unscrew the UV light assembly counterclockwise and gently lift 

out (See figure 7). Allow UV light assembly and light bulb to cool and dry completely before handling. 

Once cool and dry, grip the base of the bulb with a dry cloth and gently pull the bulb from the 

assembly unit (do not pull on the bulb by gripping the grass element) (See figure 8). Slide new bulb 

into place until properly seated. Do not test UV light until the filter has been completely reassembled. 

If the bulb works correctly the grass quartz tube where the bulb is placed must be cleaned, make sure 

the appliance is switched (pump and bulb ).Open the container lid, remove the central tube which 

connects to the lid (See figure 9), extract the glass tube , remove possible calcareous deposits on the 

tube using a suitable product. Then reassemble all the parts making sure that the o-rings and gaskets 

are correctly placed (See figure 10).

INSTRUCTIONS FOR USING 

ALPINE’S

 SUPREME

 

 

BIO-PRESSURE FILTER:

USE

MAINTENANCE AND CLEANING

CHANGING THE BULB

Figure 10

O-ring

Gasket

Gasket

Glass Tube

2000

1800

3/4” to 1-1/2” 9watt

3000

4000

3/4” to 1-1/2” 11watt

Item

Inlet/ Outlet

UV

Filter Capacity

(Gallon)

Pond Size

(Gallon)

PLF2000U

1000

1056

3/4” to 1-1/2” 7watt

PLF1000U

PLF3000U

3500

4000

3/4” to 1-1/2” 24watt

PLG3500U

SPECIFICATION CHART - 

FOR ALL FILTER MODELS

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