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Information for LittleValve Drip Systems
and Micro-Spray Sprinklers

Where pressure regulation is never needed

To replicate drip, there are several choices

For pop-up sprinklers:

NEW: We have taken a 5' center strip nozzle and closed up one of the orifices so that the center-
strip nozzle emits water only out of one side. In so doing, we have created a single-plant Pop-up Drip
Fitting. These nozzles are available on special request. They are available in Female and Male
styles. We use Rain Bird's 5CST-B nozzle for Female style and Toro's SB-2-180 for Male style.

NOTE: With this New application, we recommend a minimum distance of 18" - 24" from nozzle to plant.

There is a concern that if the 'throw' distance is less than that, the distance may reduce over time.  We have learned that in pop-ups, the distance maintains well at 20 inches or more.

For stationary application

The BS50 fitting (with ½" female threads,) can be threaded onto our RX550 - ½" Riser Extender or directly onto any length ½" threaded pipe or nipple, which is then connected to our CP050 - ½" Coupling.  We also call this a 'Single Plant Drip Fitting'.

BS50 Fitting BS50 Fitting
BS50 Fitting with 1/8" Tubing Attached to Barbed Connector


NOTE: To purchase BS50 Fitting, go to "Stationary LittleValve Parts" within "Buy Products Here" tab.

BS50 Fitting Connected to RX550

BS50 Fitting Connected to RX550

BS50 Fitting Connected to Riser Pipe and CP050

BS50 Fitting Connected to Riser Pipe and CP050

BS50 in conjunction with RX550

BS50 in conjunction with RX550

See the BS50 calculations
in table at bottom of this page.

BS50 in conjunction with CP050

BS50 in conjunction with CP050

18" Stream from the BS50 is using
9.6 GPH or  .16 GPM


To water 2 plants at the same time, use a 5’ center-strip nozzle and locate the sprinkler between
the 2 plants.

Notice that when you install the sprinkler in between 2 plants with LittleValve parts, you can
pinpoint the streams to put the water right at the base of each plant without watering the
ground between them.  This is fine for areas with just dirt or mulch and you don't want to
grow weeds.  If you have ground cover or flowers, then use 15' center strips nozzles instead
of 5' center strips.

Sprinkler Sprinkler


5’ stream bubblers are also great for drip applications putting out about 1/4 gallon per minute at distances of about 9 inches diameter. 

NOTE:  We recommend that you do not try to use throw distances LESS than what is described above.  In time, they will likely close down on you.


For Micro-Spray application -- Pop-ups and Stationary Applications

Female Nozzles:  Use Rain Bird’s 8’ Flat nozzle (NOT a regular, green 8’ nozzle) or for Male Nozzles: use Toro’s Flat spray nozzle.  With the LittleValve, adjust it down to a 24” to 60” radius.  Oftentimes a 6’ VAN makes a good micro-spray and works well for irregular planter areas.  Hunter's SS530 side strip nozzle can also be adjusted down to a micro-spray of about 2 feet.

Remember tho, Toro's Precision Rotating Nozzle (PRN) can be brought down to a radius of 14 -18 inches, which qualifies it as a Micro-Spray nozzle, as well. (See the 18" video at the bottom of the 'PRN/LittleValve Combo' tab page.) Click here for shortcut to that tab.

You will find that LittleValve Micro-Spray is the least troublesome micro-spray available on the market today and requires no pressure-regulation.

Sprinkler

LittleValve Micro-Spray

FLAT-SPRAY NOZZLE WITH

MB200

(Male Shrub Adapter) 

Watering distance in picture is from 36"- 42"

     Water usage is approximately 1/3 GPM 
or 18.5 GPH.


Notes:

1.   When using LittleValve replacement pop-up riser stems or Little Tuffy pop-up sprinklers in drip or micro-spray mode or when spraying at any distance under 6 feet, we strongly recommend inserting a LittleValve LVA ( Low Volume Application) filter screen under the LittleValve - tail first - into the bottom of the pop-up stem. Push screen into bottom of stem until it locks in place.  LVA screens are available here or from your LittleValve distributor in 25/ct bags.

With LittleValve shrub adapters, couplings or riser extenders, it is not necessary to purchase LVA Screens as you can use any manufacturer's filter screen, i.e., Rain Bird, Toro, Hunter, etc.  Place filter screen into the opening of a Schedule 80 or cut-off riser, tail down into riser opening. Screen will not fall into riser opening.  Then thread LittleValve part onto riser right over the screen.

2.   With LittleValve parts and Little Tuffy Pop-up heads, even in drip and micro-spray mode, pressure regulation is never needed regardless of how high your pressure is because ALL LittleValve sprinkler parts and Little Tuffy pop-up sprinklers are pressure-regulating sprinklers or sprinkler parts.

3.   Remember, each nozzle is individually controlled with LittleValve parts or Little Tuffy Pop-up sprinkler heads, so drips, micro-sprays and regular sprays can all be mixed on the same valve system,
if desired and if the arithmetic works.

4.  One of the more flexible features of LittleValve products is the ability to have LittleValve 'Drip' or LittleValve 'Micro-Spray' on a pop-up sprinkler as easy as having it on a stationary fixed-height shrub adapter.
 
5.  When mixing drip application with micro-sprays and/or regular sprays on the same valve, special low-flow valves are NOT necessary. BUT, when all heads are in drip mode, a low-flow valve may be necessary.

6.  CALCULATIONS

A.  5-foot center strip nozzles adjusted down to a 24” throw use approximately 6.5 gallons per hour or .11 gpm

B.  BS50 calculations table at various distances:
NOTE:  All distances are measured from sprinkler to the point where water strikes the surrounding grade with the top of sprinkler head assembly being 7 inches above grade.

Distance
9 inches
12 inches
15 inches
18 inches
30 inches
Gallons per hour (GPH)
4.36
6.67
8.57
9.63
14.94
Gallons per minute (GPM)
.073
.112
.143
.160
.250

C. Micro-Spray tests with a Rain Bird ½ circle 8’ Flat nozzle adjusted down to 27” – 36", the usage is .26 gpm or 15 – 16 gallons per hour ( approximately 1/4 gpm). At a 36” to 40” radius, the usage is .31 gpm or 18.4 gallons per hour (less than 1/3 gpm).


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